BAI TAP 1

Trn Thi Thu Trang

BAI TAP 1

Hap thu 30.49 lt kh CO2 o ktc vao 2073.156 gam dung dch KOH 13.56 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)

BAI GIAI

So mol CO2 = 30.49/22.4 = 1.361(mol)So mol KOH =2073.156x13.56 /( 56 x 100 ) = 5.02(mol)So mol KOH/So mol CO2 = 3.688 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 1.361(mol)Khoi lng muoi K2CO3 = 1.361x138 = 187.818(gam)

BAI TAP 2

Hap thu 12.947 lt kh CO2 o dktc vao 358.187 gam dung dch NaOH 26.69 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 12.947/22.4 = 0.578(mol)So mol NaOH =358.187x26.69 /( 40 x 100 ) = 2.39(mol)So mol NaOH/So mol CO2 = 4.135 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.578(mol)Khoi lng muoi Na2CO3 = 0.578x106 = 61.268(gam)

BAI TAP 3

Hap thu 38.528 lt kh SO2 o dktc vao 2832 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 38.528/22.4 = 1.72(mol)So mol NaOH =2832x10 /( 40 x 100 ) = 7.08(mol)So mol NaOH/So mol SO2 = 4.116 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 1.72(mol)Khoi lng muoi Na2SO3 = 1.72x126 = 216.72(gam)

BAI TAP 4

Hap thu 41.238 lt kh CO2 o dktc vao 1471.092 gam dung dch NaOH 18.68 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 41.238/22.4 = 1.841(mol)So mol NaOH =1471.092x18.68 /( 40 x 100 ) = 6.87(mol)So mol NaOH/So mol CO2 = 3.732 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.841(mol)Khoi lng muoi Na2CO3 = 1.841x106 = 195.146(gam)

BAI TAP 5

Hap thu V lt kh SO2 o dktc vao 0.15 lt dung dch NaOH 5.19 M thu c 79.338 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.15 x 5.19 = 0.781Khoi lng hon hp 2 muoi : 104x + 126y = 79.338Giai ra ta c : x = 0.735(mol) , y = 0.023(mol)Khoi lng cua muoi NaHSO3 = 0.735 x 104 = 76.44 (gam)Khoi lng cua muoi Na2SO3 = 0.023x126 = 2.898 (gam)

BAI TAP 6

Hap thu V lt kh CO2 o dktc vao 2.967 lt dung dch NaOH 0.89 M thu c 140.376 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 2.967 x 0.89 = 2.641Khoi lng hon hp 2 muoi : 84x + 106y = 140.376Giai ra ta c : x = 0.01(mol) , y = 1.314(mol)Khoi lng cua muoi NaHCO3 = 0.01 x 84 = 1.092 (gam)Khoi lng cua muoi Na2CO3 = 1.314x106 = 139.284 (gam)

BAI TAP 7

Hap thu 29.434 lt kh CO2 o dktc vao 364.728 gam dung dch NaOH 36.63 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 29.434/22.4 = 1.314(mol)So mol NaOH =364.728x36.63 /( 40 x 100 ) = 3.34(mol)So mol NaOH/So mol CO2 = 2.542 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.314(mol)Khoi lng muoi Na2CO3 = 1.314x106 = 139.284(gam)

BAI TAP 8

Cho m gam P2O5 tac dung vi 1.34 lt dung dch NaOH 2.57 M thu c 241.104 gam 2 muoi Na2HPO4 va Na3PO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua Na2HPO4 , y la so mol cua Na3PO4P2O5 + 4NaOH = 2Na2HPO4 + H2O (1)0.5x2x xP2O5 + 6NaOH = 2Na3PO4 + 3H2O (2)0.5y 3y yTa co : So mol NaOH : x + 2y = 1.34 x 2.57 = 3.44Khoi lng hon hp 2 muoi : 142x + 164y = 241.104Giai ra ta c : x = 1.624(mol) , y = 0.064(mol)Khoi lng cua muoi Na2HPO4 = 1.624 x 142 = 230.608 (gam)Khoi lng cua muoi Na3PO4 = 0.064x164 = 10.496 (gam)

BAI TAP 9

Hap thu V lt kh CO2 o dktc vao 0.285 lt dung dch KOH 4.65 M thu c 105.196 gam 2 muoi KHCO3 va K2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;K=39;H=1)

BAI GIAI

Goi x la so mol cua KHCO3 , y la so mol cua K2CO3KOH + CO2 = KHCO3 (1)x xx2KOH + CO2 = K2CO3 + H2O (2)2yy yTa co : So mol KOH : x + 2y = 0.285 x 4.65 = 1.326Khoi lng hon hp 2 muoi : 100x + 138y = 105.196Giai ra ta c : x = 0.442(mol) , y = 0.442(mol)Khoi lng cua muoi KHCO3 = 0.442 x 100 = 44.2 (gam)Khoi lng cua muoi K2CO3 = 0.442x138 = 60.996 (gam)

BAI TAP 10

Hap thu 26.074 lt kh SO2 o dktc vao 960 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 26.074/22.4 = 1.164(mol)So mol NaOH =960x10 /( 40 x 100 ) = 2.4(mol)So mol NaOH/So mol SO2 = 2.062 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 1.164(mol)Khoi lng muoi Na2SO3 = 1.164x126 = 146.664(gam)

BAI TAP 11

Hap thu 38.909 lt kh CO2 o dktc vao 3.004 lt dung dch NaOH 2.3 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 38.909/22.4 = 1.737(mol)So mol NaOH =3.004x2.3 = 6.91(mol)So mol NaOH/So mol CO2 = 3.978 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.737(mol)Khoi lng muoi Na2CO3 = 1.737x106 = 184.122(gam)

BAI TAP 12

Hap thu V lt kh CO2 o dktc vao 0.314 lt dung dch NaOH 3.36 M thu c 66.796 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.314 x 3.36 = 1.055Khoi lng hon hp 2 muoi : 84x + 106y = 66.796Giai ra ta c : x = 0.35(mol) , y = 0.352(mol)Khoi lng cua muoi NaHCO3 = 0.35 x 84 = 29.484 (gam)Khoi lng cua muoi Na2CO3 = 0.352x106 = 37.312 (gam)

BAI TAP 13

Hap thu 36.669 lt kh CO2 o dktc vao 409.923 gam dung dch NaOH 24.59 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 36.669/22.4 = 1.637(mol)So mol NaOH =409.923x24.59 /( 40 x 100 ) = 2.52(mol)1 < So mol NaOH/So mol CO2 = 1.539 < 2 => Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.637So mol NaOH : 2x + y = 2.52Giai ra ta c : x= 0.754 (mol) , y = 0.883 (mol)Khoi lng muoi NaHCO3 = 0.754x84 = 63.336(gam)Khoi lng muoi Na2CO3 = 0.883x106 = 93.598(gam)

BAI TAP 14

Hap thu 36.624 lt kh CO2 o dktc vao 2.264 lt dung dch NaOH 3.37 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 36.624/22.4 = 1.635(mol)So mol NaOH =2.264x3.37 = 7.63(mol)So mol NaOH/So mol CO2 = 4.667 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.635(mol)Khoi lng muoi Na2CO3 = 1.635x106 = 173.31(gam)

BAI TAP 15

Hap thu 44.419 lt kh SO2 o ktc vao 1.258 lt dung dch KOH 5.31 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)

BAI GIAI

So mol SO2 = 44.419/22.4 = 1.983(mol)So mol KOH =1.258x5.31 = 6.68(mol)So mol KOH/So mol SO2 = 3.369 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 1.983(mol)Khoi lng muoi K2SO3 = 1.983x158 = 313.314(gam)

BAI TAP 16

Hap thu 43.93 lt kh CO2 o dktc vao 1.778 lt dung dch KOH 4.28 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)

BAI GIAI

So mol CO2 = 43.93/22.4 = 1.961(mol)So mol KOH =1.778x4.28 = 7.61(mol)So mol KOH/So mol CO2 = 3.881 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 1.961(mol)Khoi lng muoi K2CO3 = 1.961x138 = 270.618(gam)

BAI TAP 17

Hap thu 36.019 lt kh CO2 o dktc vao 882.482 gam dung dch NaOH 31.91 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 36.019/22.4 = 1.608(mol)So mol NaOH =882.482x31.91 /( 40 x 100 ) = 7.04(mol)So mol NaOH/So mol CO2 = 4.378 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.608(mol)Khoi lng muoi Na2CO3 = 1.608x106 = 170.448(gam)

BAI TAP 18

Hap thu V lt kh SO2 o dktc vao 0.088 lt dung dch NaOH 3.65 M thu c 27.606 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.088 x 3.65 = 0.323Khoi lng hon hp 2 muoi : 104x + 126y = 27.606Giai ra ta c : x = 0.177(mol) , y = 0.073(mol)Khoi lng cua muoi NaHSO3 = 0.177 x 104 = 18.408 (gam)Khoi lng cua muoi Na2SO3 = 0.073x126 = 9.198 (gam)

BAI TAP 19

Hap thu 6.88 lt kh CO2 o dktc vao 2.052 lt dung dch KOH 1.16 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)

BAI GIAI

So mol CO2 = 6.88/22.4 = 0.307(mol)So mol KOH =2.052x1.16 = 2.38(mol)So mol KOH/So mol CO2 = 7.752 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 0.307(mol)Khoi lng muoi K2CO3 = 0.307x138 = 42.366(gam)

BAI TAP 20

Hap thu V lt kh CO2 o dktc vao 0.062 lt dung dch NaOH 2.42 M thu c 9.5 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.062 x 2.42 = 0.15Khoi lng hon hp 2 muoi : 84x + 106y = 9.5Giai ra ta c : x = 0.05(mol) , y = 0.05(mol)Khoi lng cua muoi NaHCO3 = 0.05 x 84 = 4.2 (gam)Khoi lng cua muoi Na2CO3 = 0.05x106 = 5.3 (gam)

BAI TAP 21

Hap thu 18.144 lt kh SO2 o dktc vao dung dch NaOH thu c 93.15 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol SO2 : x + y = 18.144 /22.4 = 0.81Khoi lng hon hp 2 muoi : 104x + 126y = 93.15Giai ra ta c : x = 0.405(mol) , y = 0.405(mol)Khoi lng cua muoi NaHSO3 = 0.405 x 104 = 42.12 (gam)Khoi lng cua muoi Na2SO3 = 0.405x126 = 51.03 (gam)

BAI TAP 22

Hap thu 5.6 lt kh SO2 o ktc vao 2.758 lt dung dch NaOH 2.27 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 5.6/22.4 = 0.25(mol)So mol NaOH =2.758x2.27 = 6.26(mol)So mol NaOH/So mol SO2 = 25.04 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.25(mol)Khoi lng muoi Na2SO3 = 0.25x126 = 31.5(gam)

BAI TAP 23

Hap thu V lt kh SO2 o dktc vao 1.776 lt dung dch NaOH 2.03 M thu c 230.212 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 1.776 x 2.03 = 3.606Khoi lng hon hp 2 muoi : 104x + 126y = 230.212Giai ra ta c : x = 0.074(mol) , y = 1.766(mol)Khoi lng cua muoi NaHSO3 = 0.074 x 104 = 7.696 (gam)Khoi lng cua muoi Na2SO3 = 1.766x126 = 222.516 (gam)

BAI TAP 24

Hap thu 36.422 lt kh SO2 o ktc vao 2.583 lt dung dch NaOH 2.28 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 36.422/22.4 = 1.626(mol)So mol NaOH =2.583x2.28 = 5.89(mol)So mol NaOH/So mol SO2 = 3.622 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 1.626(mol)Khoi lng muoi Na2SO3 = 1.626x126 = 204.876(gam)

BAI TAP 25

Hap thu 21.638 lt kh SO2 o ktc vao 1.842 lt dung dch KOH 3.16 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)

BAI GIAI

So mol SO2 = 21.638/22.4 = 0.966(mol)So mol KOH =1.842x3.16 = 5.82(mol)So mol KOH/So mol SO2 = 6.025 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 0.966(mol)Khoi lng muoi K2SO3 = 0.966x158 = 152.628(gam)

BAI TAP 26

Hap thu 30.374 lt kh CO2 o dktc vao 1.543 lt dung dch NaOH 0.81 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 30.374/22.4 = 1.356(mol)So mol NaOH =1.543x0.81 = 1.25(mol)0 < So mol NaOH/So mol CO2 = 0.922 Co 1 muoi sinh ra la : NaHCO3NaOH + CO2 = NaHCO3Ta co : So mol NaHCO3 = so mol NaOH = 1.25(mol)Khoi lng muoi NaHCO3 = 1.25x84 = 105(g)

BAI TAP 27

Hap thu 5.152 lt kh SO2 o ktc vao 11.964 lt dung dch NaOH 0.56 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 5.152/22.4 = 0.23(mol)So mol NaOH =11.964x0.56 = 6.7(mol)So mol NaOH/So mol SO2 = 29.13 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.23(mol)Khoi lng muoi Na2SO3 = 0.23x126 = 28.98(gam)

BAI TAP 28

Cho 124.96 gam P2O5 tac dung vi 1.701 lt dung dch NaOH 3.54 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)

BAI GIAI

So mol P2O5 = 124.96/142 = 0.88(mol)So mol NaOH =1.701x3.54 = 6.02(mol)So mol NaOH/So mol P2O5 = 6.841 > = 6 => Co 1 muoi sinh ra la : Na3PO4P2O5 + 6NaOH = 2Na3PO4 + 3H2OTa co : So mol Na3PO4 = 2 x so mol P2O5 = 2 x 0.88 = 1.76(mol)Khoi lng muoi Na3PO4 = 1.76x164 = 288.64(gam)

BAI TAP 29

Hap thu V lt kh SO2 o dktc vao 1.326 lt dung dch NaOH 1.4 M thu c 165.658 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 1.326 x 1.4 = 1.857Khoi lng hon hp 2 muoi : 104x + 126y = 165.658Giai ra ta c : x = 1.187(mol) , y = 0.335(mol)Khoi lng cua muoi NaHSO3 = 1.187 x 104 = 123.448 (gam)Khoi lng cua muoi Na2SO3 = 0.335x126 = 42.21 (gam)

BAI TAP 30

Hap thu 34.003 lt kh CO2 o dktc vao 2.178 lt dung dch NaOH 1.91 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 34.003/22.4 = 1.518(mol)So mol NaOH =2.178x1.91 = 4.16(mol)So mol NaOH/So mol CO2 = 2.74 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.518(mol)Khoi lng muoi Na2CO3 = 1.518x106 = 160.908(gam)

BAI TAP 31

Cho 266.25 gam P2O5 tac dung vi 688 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)

BAI GIAI

So mol P2O5 = 266.25/142 = 1.875(mol)So mol NaOH =688x10 /( 40 x 100 ) = 1.72(mol)0 = < So mol NaOH/So mol P2O5 = 0.917 Co 1 muoi sinh ra la : NaH2PO4P2O5 + 2NaOH +H2O = 2NaH2PO4Ta co : So mol NaH2PO4 = so mol NaOH = 1.72(mol)Khoi lng muoi NaH2PO4 = 1.72x120 = 206.4(gam)

BAI TAP 32

Hap thu 5.6 lt kh CO2 o dktc vao dung dch KOH thu c 29.75 gam 2 muoi KHCO3 va K2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;K=39;H=1)

BAI GIAI

Goi x la so mol cua KHCO3 , y la so mol cua K2CO3KOH + CO2 = KHCO3 (1)x xx2KOH + CO2 = K2CO3 + H2O (2)2yy yTa co : So mol CO2 : x + y = 5.6 /22.4 = 0.25Khoi lng hon hp 2 muoi : 100x + 138y = 29.75Giai ra ta c : x = 0.125(mol) , y = 0.125(mol)Khoi lng cua muoi KHCO3 = 0.125 x 100 = 12.5 (gam)Khoi lng cua muoi K2CO3 = 0.125x138 = 17.25 (gam)

BAI TAP 33

Hap thu 31.718 lt kh CO2 o dktc vao 1922.623 gam dung dch NaOH 15.25 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 31.718/22.4 = 1.416(mol)So mol NaOH =1922.623x15.25 /( 40 x 100 ) = 7.33(mol)So mol NaOH/So mol CO2 = 5.177 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.416(mol)Khoi lng muoi Na2CO3 = 1.416x106 = 150.096(gam)

BAI TAP 34

Cho 130.214 gam P2O5 tac dung vi 2680 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)

BAI GIAI

So mol P2O5 = 130.214/142 = 0.917(mol)So mol NaOH =2680x10 = 6.7(mol)So mol NaOH/So mol P2O5 = 7.306 > = 6 => Co 1 muoi sinh ra la : Na3PO4P2O5 + 6NaOH = 2Na3PO4 + 3H2OTa co : So mol Na3PO4 = 2 x so mol P2O5 = 2 x 0.917 = 1.83(mol)Khoi lng muoi Na3PO4 = 1.83x164 = 300.78(gam)

BAI TAP 35

Hap thu V lt kh CO2 o dktc vao 1.199 lt dung dch NaOH 2.12 M thu c 160.93 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 1.199 x 2.12 = 2.541Khoi lng hon hp 2 muoi : 84x + 106y = 160.93Giai ra ta c : x = 0.85(mol) , y = 0.847(mol)Khoi lng cua muoi NaHCO3 = 0.85 x 84 = 71.148 (gam)Khoi lng cua muoi Na2CO3 = 0.847x106 = 89.782 (gam)

BAI TAP 36

Hap thu 15.3 lt kh CO2 o ktc vao 1321.6 gam dung dch KOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)

BAI GIAI

So mol CO2 = 15.3/22.4 = 0.683(mol)So mol KOH =1321.6x10 /( 56 x 100 ) = 2.36(mol)So mol KOH/So mol CO2 = 3.455 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 0.683(mol)Khoi lng muoi K2CO3 = 0.683x138 = 94.254(gam)

BAI TAP 37

Cho m gam P2O5 tac dung vi 3.817 lt dung dch KOH 0.12 M thu c 49.548 gam 2 muoi KH2PO4 va K2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;K=39;H=1)

BAI GIAI

Goi x la so mol cua KH2PO4 , y la so mol cua K2HPO4P2O5+ 2KOH + +H2O = 2KH2PO4 (1)0.5x x xP2O5 + 4KOH = 2K2HPO4 + H2O (2)0.5y 2y yTa co : So mol KOH : x + 2y = 3.817 x 0.12 = 0.458Khoi lng hon hp 2 muoi : 136x + 174y = 49.548Giai ra ta c : x = 0.198(mol) , y = 0.13(mol)Khoi lng cua muoi KH2PO4 = 0.198 x 136 = 26.928 (gam)Khoi lng cua muoi K2HPO4 = 0.13x174 = 22.62 (gam)

BAI TAP 38

Hap thu 8.4 lt kh CO2 o dktc vao 121.396 gam dung dch NaOH 13.18 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 8.4/22.4 = 0.375(mol)So mol NaOH =121.396x13.18 /( 40 x 100 ) = 0.4(mol)1 < So mol NaOH/So mol CO2 = 1.067 < 2 => Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 0.375So mol NaOH : 2x + y = 0.4Giai ra ta c : x= 0.35 (mol) , y = 0.025 (mol)Khoi lng muoi NaHCO3 = 0.35x84 = 29.4(gam)Khoi lng muoi Na2CO3 = 0.025x106 = 2.65(gam)

BAI TAP 39

Hap thu 10.326 lt kh CO2 o dktc vao dung dch NaOH thu c 41.672 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol CO2 : x + y = 10.326 /22.4 = 0.461Khoi lng hon hp 2 muoi : 84x + 106y = 41.672Giai ra ta c : x = 0.33(mol) , y = 0.134(mol)Khoi lng cua muoi NaHCO3 = 0.33 x 84 = 27.468 (gam)Khoi lng cua muoi Na2CO3 = 0.134x106 = 14.204 (gam)

BAI TAP 40

Hap thu 7.459 lt kh SO2 o ktc vao 246.599 gam dung dch KOH 23.52 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)

BAI GIAI

So mol SO2 = 7.459/22.4 = 0.333(mol)So mol KOH =246.599x23.52 /( 56 x 100 ) = 1.45(mol)So mol KOH/So mol SO2 = 4.354 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 0.333(mol)Khoi lng muoi K2SO3 = 0.333x158 = 52.614(gam)

BAI TAP 41

Hap thu V lt kh CO2 o dktc vao 0.308 lt dung dch NaOH 4.14 M thu c 80.856 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.308 x 4.14 = 1.277Khoi lng hon hp 2 muoi : 84x + 106y = 80.856Giai ra ta c : x = 0.43(mol) , y = 0.426(mol)Khoi lng cua muoi NaHCO3 = 0.43 x 84 = 35.7 (gam)Khoi lng cua muoi Na2CO3 = 0.426x106 = 45.156 (gam)

BAI TAP 42

Hap thu 35.28 lt kh CO2 o dktc vao 1.59 lt dung dch NaOH 4.24 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 35.28/22.4 = 1.575(mol)So mol NaOH =1.59x4.24 = 6.74(mol)So mol NaOH/So mol CO2 = 4.279 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.575(mol)Khoi lng muoi Na2CO3 = 1.575x106 = 166.95(gam)

BAI TAP 43

Hap thu 28.269 lt kh CO2 o dktc vao 823.204 gam dung dch NaOH 21.72 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 28.269/22.4 = 1.262(mol)So mol NaOH =823.204x21.72 /( 40 x 100 ) = 4.47(mol)So mol NaOH/So mol CO2 = 3.542 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.262(mol)Khoi lng muoi Na2CO3 = 1.262x106 = 133.772(gam)

BAI TAP 44

Hap thu 28.381 lt kh SO2 o ktc vao 5.648 lt dung dch NaOH 1.28 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 28.381/22.4 = 1.267(mol)So mol NaOH =5.648x1.28 = 7.23(mol)So mol NaOH/So mol SO2 = 5.706 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 1.267(mol)Khoi lng muoi Na2SO3 = 1.267x126 = 159.642(gam)

BAI TAP 45

Hap thu 5.13 lt kh SO2 o dktc vao dung dch NaOH thu c 24.212 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol SO2 : x + y = 5.13 /22.4 = 0.229Khoi lng hon hp 2 muoi : 104x + 126y = 24.212Giai ra ta c : x = 0.211(mol) , y = 0.018(mol)Khoi lng cua muoi NaHSO3 = 0.211 x 104 = 21.944 (gam)Khoi lng cua muoi Na2SO3 = 0.018x126 = 2.268 (gam)

BAI TAP 46

Hap thu V lt kh CO2 o dktc vao 1.789 lt dung dch NaOH 1.82 M thu c 179.016 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 1.789 x 1.82 = 3.256Khoi lng hon hp 2 muoi : 84x + 106y = 179.016Giai ra ta c : x = 0.21(mol) , y = 1.524(mol)Khoi lng cua muoi NaHCO3 = 0.21 x 84 = 17.472 (gam)Khoi lng cua muoi Na2CO3 = 1.524x106 = 161.544 (gam)

BAI TAP 47

Hap thu 18.032 lt kh SO2 o ktc vao 0.578 lt dung dch NaOH 5.21 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 18.032/22.4 = 0.805(mol)So mol NaOH =0.578x5.21 = 3.01(mol)So mol NaOH/So mol SO2 = 3.739 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.805(mol)Khoi lng muoi Na2SO3 = 0.805x126 = 101.43(gam)

BAI TAP 48

Cho 25.56 gam P2O5 tac dung vi lt dung dch NaOH thu c 56.4 gam 2 muoi Na2HPO4 va Na3PO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua Na2HPO4 , y la so mol cua Na3PO4P2O5 + 4NaOH = 2Na2HPO4 + H2O (1)0.5x2x xP2O5 + 6NaOH = 2Na3PO4 + 3H2O (2)0.5y 3y yTa co : So mol P2O5 : 0.5x + 0.5y = 25.56 /142 = 0.18Khoi lng hon hp 2 muoi : 142x + 164y = 56.4Giai ra ta c : x = 0.12(mol) , y = 0.24(mol)Khoi lng cua muoi Na2HPO4 = 0.12 x 142 = 17.04 (gam)Khoi lng cua muoi Na3PO4 = 0.24x164 = 39.36 (gam)

BAI TAP 49

Cho m gam P2O5 tac dung vi 2.658 lt dung dch KOH 1.72 M thu c 429.674 gam 2 muoi KH2PO4 va K2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;K=39;H=1)

BAI GIAI

Goi x la so mol cua KH2PO4 , y la so mol cua K2HPO4P2O5+ 2KOH + +H2O = 2KH2PO4 (1)0.5x x xP2O5 + 4KOH = 2K2HPO4 + H2O (2)0.5y 2y yTa co : So mol KOH : x + 2y = 2.658 x 1.72 = 4.571Khoi lng hon hp 2 muoi : 136x + 174y = 429.674Giai ra ta c : x = 0.653(mol) , y = 1.959(mol)Khoi lng cua muoi KH2PO4 = 0.653 x 136 = 88.808 (gam)Khoi lng cua muoi K2HPO4 = 1.959x174 = 340.866 (gam)

BAI TAP 50

Hap thu V lt kh SO2 o dktc vao 3.879 lt dung dch NaOH 0.29 M thu c 75.18 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 3.879 x 0.29 = 1.125Khoi lng hon hp 2 muoi : 104x + 126y = 75.18Giai ra ta c : x = 0.105(mol) , y = 0.51(mol)Khoi lng cua muoi NaHSO3 = 0.105 x 104 = 10.92 (gam)Khoi lng cua muoi Na2SO3 = 0.51x126 = 64.26 (gam)

BAI TAP 51

Hap thu 5.6 lt kh CO2 o ktc vao 952 gam dung dch KOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)

BAI GIAI

So mol CO2 = 5.6/22.4 = 0.25(mol)So mol KOH =952x10 /( 56 x 100 ) = 1.7(mol)So mol KOH/So mol CO2 = 6.8 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 0.25(mol)Khoi lng muoi K2CO3 = 0.25x138 = 34.5(gam)

BAI TAP 52

Hap thu 28.829 lt kh SO2 o dktc vao 596 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 28.829/22.4 = 1.287(mol)So mol NaOH =596x10 /( 40 x 100 ) = 1.49(mol)1 < So mol NaOH/So mol SO2 = 1.158 < 2 =>Co 2 muoi sinh ra la : NaHSO3 Na2SO3NaOH + SO2 = NaHSO3(1)x x x2NaOH + SO2 = Na2SO3 + H2O(2)2y yyGoi x la so mol cua SO2(1) va y la so mol cua SO2(2)Ta co : So mol SO2 : x+y = 1.287So mol NaOH : 2x + y = 1.49Giai ra ta c : x= 1.084 (mol) , y = 0.203 (mol)Khoi lng muoi NaHSO3 = 1.084x104 = 112.736(g)Khoi lng muoi Na2SO3 = 0.203x126 = 25.578(gam)

BAI TAP 53

Cho 218.822 gam P2O5 tac dung vi 1.738 lt dung dch NaOH 1.45 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)

BAI GIAI

So mol P2O5 = 218.822/142 = 1.541(mol)So mol NaOH =1.738x1.45 = 2.52(mol)0 = < So mol NaOH/So mol P2O5 = 1.635 Co 1 muoi sinh ra la : NaH2PO4P2O5 + 2NaOH +H2O = 2NaH2PO4Ta co : So mol NaH2PO4 = so mol NaOH = 2.52(mol)Khoi lng muoi NaH2PO4 = 2.52x120 = 302.4(gam)

BAI TAP 54

Hap thu 8.98 lt kh CO2 o ktc vao 384.813 gam dung dch KOH 37.4 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)

BAI GIAI

So mol CO2 = 8.98/22.4 = 0.401(mol)So mol KOH =384.813x37.4 /( 56 x 100 ) = 2.57(mol)So mol KOH/So mol CO2 = 6.409 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 0.401(mol)Khoi lng muoi K2CO3 = 0.401x138 = 55.338(gam)

BAI TAP 55

Hap thu 35.168 lt kh CO2 o dktc vao 0.491 lt dung dch NaOH 1.73 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 35.168/22.4 = 1.57(mol)So mol NaOH =0.491x1.73 = 0.85(mol)0 < So mol NaOH/So mol CO2 = 0.541 Co 1 muoi sinh ra la : NaHCO3NaOH + CO2 = NaHCO3Ta co : So mol NaHCO3 = so mol NaOH = 0.85(mol)Khoi lng muoi NaHCO3 = 0.85x84 = 71.4(g)

BAI TAP 56

Hap thu 16.755 lt kh CO2 o dktc vao 53.178 gam dung dch NaOH 30.84 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 16.755/22.4 = 0.748(mol)So mol NaOH =53.178x30.84 /( 40 x 100 ) = 0.41(mol)0 < So mol NaOH/So mol CO2 = 0.548 Co 1 muoi sinh ra la : NaHCO3NaOH + CO2 = NaHCO3Ta co : So mol NaHCO3 = so mol NaOH = 0.41(mol)Khoi lng muoi NaHCO3 = 0.41x84 = 34.44(g)

BAI TAP 57

Hap thu V lt kh SO2 o dktc vao 0.432 lt dung dch NaOH 3.63 M thu c 120.186 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.432 x 3.63 = 1.568Khoi lng hon hp 2 muoi : 104x + 126y = 120.186Giai ra ta c : x = 0.522(mol) , y = 0.523(mol)Khoi lng cua muoi NaHSO3 = 0.522 x 104 = 54.288 (gam)Khoi lng cua muoi Na2SO3 = 0.523x126 = 65.898 (gam)

BAI TAP 58

Hap thu 30.82 lt kh CO2 o dktc vao 1.338 lt dung dch KOH 2.4 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)

BAI GIAI

So mol CO2 = 30.82/22.4 = 1.376(mol)So mol KOH =1.338x2.4 = 3.21(mol)So mol KOH/So mol CO2 = 2.333 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 1.376(mol)Khoi lng muoi K2CO3 = 1.376x138 = 189.888(gam)

BAI TAP 59

Hap thu V lt kh CO2 o dktc vao 0.178 lt dung dch NaOH 1.97 M thu c 23.2 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.178 x 1.97 = 0.35Khoi lng hon hp 2 muoi : 84x + 106y = 23.2Giai ra ta c : x = 0.15(mol) , y = 0.1(mol)Khoi lng cua muoi NaHCO3 = 0.15 x 84 = 12.6 (gam)Khoi lng cua muoi Na2CO3 = 0.1x106 = 10.6 (gam)

BAI TAP 60

Hap thu 12.32 lt kh SO2 o ktc vao 8.215 lt dung dch KOH 0.93 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)

BAI GIAI

So mol SO2 = 12.32/22.4 = 0.55(mol)So mol KOH =8.215x0.93 = 7.64(mol)So mol KOH/So mol SO2 = 13.891 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 0.55(mol)Khoi lng muoi K2SO3 = 0.55x158 = 86.9(gam)

BAI TAP 61

Hap thu 5.6 lt kh CO2 o dktc vao 901.798 gam dung dch NaOH 28.92 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 5.6/22.4 = 0.25(mol)So mol NaOH =901.798x28.92 /( 40 x 100 ) = 6.52(mol)So mol NaOH/So mol CO2 = 26.08 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.25(mol)Khoi lng muoi Na2CO3 = 0.25x106 = 26.5(gam)

BAI TAP 62

Hap thu 22.915 lt kh CO2 o dktc vao 0.144 lt dung dch NaOH 4.43 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 22.915/22.4 = 1.023(mol)So mol NaOH =0.144x4.43 = 0.64(mol)0 < So mol NaOH/So mol CO2 = 0.626 Co 1 muoi sinh ra la : NaHCO3NaOH + CO2 = NaHCO3Ta co : So mol NaHCO3 = so mol NaOH = 0.64(mol)Khoi lng muoi NaHCO3 = 0.64x84 = 53.76(g)

BAI TAP 63

Hap thu 3.091 lt kh SO2 o ktc vao 1.569 lt dung dch NaOH 2.32 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 3.091/22.4 = 0.138(mol)So mol NaOH =1.569x2.32 = 3.64(mol)So mol NaOH/So mol SO2 = 26.377 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.138(mol)Khoi lng muoi Na2SO3 = 0.138x126 = 17.388(gam)

BAI TAP 64

Hap thu 30.509 lt kh CO2 o dktc vao 3.169 lt dung dch NaOH 2.43 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 30.509/22.4 = 1.362(mol)So mol NaOH =3.169x2.43 = 7.7(mol)So mol NaOH/So mol CO2 = 5.653 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.362(mol)Khoi lng muoi Na2CO3 = 1.362x106 = 144.372(gam)

BAI TAP 65

Hap thu 35.526 lt kh SO2 o dktc vao dung dch NaOH thu c 182.39 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol SO2 : x + y = 35.526 /22.4 = 1.586Khoi lng hon hp 2 muoi : 104x + 126y = 182.39Giai ra ta c : x = 0.793(mol) , y = 0.793(mol)Khoi lng cua muoi NaHSO3 = 0.793 x 104 = 82.472 (gam)Khoi lng cua muoi Na2SO3 = 0.793x126 = 99.918 (gam)

BAI TAP 66

Cho 100.678 gam P2O5 tac dung vi 2.172 lt dung dch KOH 1.28 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;K=39;H=1)

BAI GIAI

So mol P2O5 = 100.678/142 = 0.709(mol)So mol KOH =2.172x1.28 = 2.78(mol)2 < So mol KOH/So mol P2O5 = 3.921 < 4 =>Co 2 muoi sinh ra la : KH2PO4 K2HPO4P2O5+ 2KOH + +H2O = 2KH2PO4(1)x 2x2xP2O5 + 4KOH = 2K2HPO4 + H2O(2)y4y2yGoi x la so mol cua P2O5(1) va y la so mol cua P2O5(2)Ta co : So mol P2O5 : x+y = 0.709So mol KOH : 2x + 4y = 2.78Giai ra ta c : x= 0.028 (mol) , y = 0.681 (mol)Khoi lng muoi KH2PO4 = 2x0.028x136 = 7.616(gam)Khoi lng muoi K2HPO4 = 2x0.681x174 = 236.988(gam)

BAI TAP 67

Hap thu 18.726 lt kh SO2 o ktc vao 623.016 gam dung dch KOH 10.08 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)

BAI GIAI

So mol SO2 = 18.726/22.4 = 0.836(mol)So mol KOH =623.016x10.08 /( 56 x 100 ) = 1.57(mol)1 < So mol KOH/So mol SO2 = 1.878 < 2 =>Co 2 muoi sinh ra la : KHSO3 K2SO3KOH + SO2 = KHSO3(1)x xx2KOH + SO2 = K2SO3 + H2O(2)2yyyGoi x la so mol cua SO2(1) va y la so mol cua SO2(2)Ta co : So mol SO2 : x+y = 0.836So mol KOH : 2x + y = 1.57Giai ra ta c : x= 0.102 (mol) , y = 0.734 (mol)Khoi lng muoi KHSO3 = 0.102x120 = 12.24(gam)Khoi lng muoi K2SO3 = 0.734x158 = 115.972(gam)

BAI TAP 68

Hap thu V lt kh CO2 o dktc vao 0.198 lt dung dch NaOH 1.78 M thu c 22.376 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.198 x 1.78 = 0.352Khoi lng hon hp 2 muoi : 84x + 106y = 22.376Giai ra ta c : x = 0.12(mol) , y = 0.116(mol)Khoi lng cua muoi NaHCO3 = 0.12 x 84 = 10.08 (gam)Khoi lng cua muoi Na2CO3 = 0.116x106 = 12.296 (gam)

BAI TAP 69

Hap thu 5.958 lt kh SO2 o dktc vao 490.765 gam dung dch NaOH 37.9 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 5.958/22.4 = 0.266(mol)So mol NaOH =490.765x37.9 /( 40 x 100 ) = 4.65(mol)So mol NaOH/So mol SO2 = 17.481 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.266(mol)Khoi lng muoi Na2SO3 = 0.266x126 = 33.516(gam)

BAI TAP 70

Hap thu 18.794 lt kh SO2 o dktc vao dung dch NaOH thu c 98.146 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol SO2 : x + y = 18.794 /22.4 = 0.839Khoi lng hon hp 2 muoi : 104x + 126y = 98.146Giai ra ta c : x = 0.344(mol) , y = 0.495(mol)Khoi lng cua muoi NaHSO3 = 0.344 x 104 = 35.776 (gam)Khoi lng cua muoi Na2SO3 = 0.495x126 = 62.37 (gam)

BAI TAP 71

Hap thu 9.946 lt kh CO2 o dktc vao 1.895 lt dung dch NaOH 3.14 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 9.946/22.4 = 0.444(mol)So mol NaOH =1.895x3.14 = 5.95(mol)So mol NaOH/So mol CO2 = 13.401 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.444(mol)Khoi lng muoi Na2CO3 = 0.444x106 = 47.064(gam)

BAI TAP 72

Hap thu 12.43 lt kh CO2 o dktc vao 0.888 lt dung dch KOH 4.19 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)

BAI GIAI

So mol CO2 = 12.43/22.4 = 0.555(mol)So mol KOH =0.888x4.19 = 3.72(mol)So mol KOH/So mol CO2 = 6.703 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 0.555(mol)Khoi lng muoi K2CO3 = 0.555x138 = 76.59(gam)

BAI TAP 73

Hap thu 39.133 lt kh CO2 o dktc vao 1.784 lt dung dch NaOH 1.48 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 39.133/22.4 = 1.747(mol)So mol NaOH =1.784x1.48 = 2.64(mol)1 < So mol NaOH/So mol CO2 = 1.511 < 2 =>Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.747So mol NaOH : 2x + y = 2.64Giai ra ta c : x= 0.854 (mol) , y = 0.893 (mol)Khoi lng muoi NaHCO3 = 0.854x84 = 71.736(gam)Khoi lng muoi Na2CO3 = 0.893x106 = 94.658(gam)

BAI TAP 74

Hap thu 2.352 lt kh CO2 o dktc vao 2.892 lt dung dch NaOH 2.68 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 2.352/22.4 = 0.105(mol)So mol NaOH =2.892x2.68 = 7.75(mol)So mol NaOH/So mol CO2 = 73.81 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.105(mol)Khoi lng muoi Na2CO3 = 0.105x106 = 11.13(gam)

BAI TAP 75

Cho 50.41 gam P2O5 tac dung vi 2700 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)

BAI GIAI

So mol P2O5 = 50.41/142 = 0.355(mol)So mol NaOH =2700x10 = 6.75(mol)So mol NaOH/So mol P2O5 = 19.014 > = 6 => Co 1 muoi sinh ra la : Na3PO4P2O5 + 6NaOH = 2Na3PO4 + 3H2OTa co : So mol Na3PO4 = 2 x so mol P2O5 = 2 x 0.355 = 0.71(mol)Khoi lng muoi Na3PO4 = 0.71x164 = 116.44(gam)

BAI TAP 76

Hap thu 2.37 lt kh CO2 o dktc vao 4.041 lt dung dch KOH 1.46 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)

BAI GIAI

So mol CO2 = 2.37/22.4 = 0.106(mol)So mol KOH =4.041x1.46 = 5.9(mol)So mol KOH/So mol CO2 = 55.66 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 0.106(mol)Khoi lng muoi K2CO3 = 0.106x138 = 14.628(gam)

BAI TAP 77

Hap thu 41.731 lt kh CO2 o dktc vao 510.787 gam dung dch NaOH 17.15 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 41.731/22.4 = 1.863(mol)So mol NaOH =510.787x17.15 /( 40 x 100 ) = 2.19(mol)1 < So mol NaOH/So mol CO2 = 1.176 < 2 => Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.863So mol NaOH : 2x + y = 2.19Giai ra ta c : x= 1.536 (mol) , y = 0.327 (mol)Khoi lng muoi NaHCO3 = 1.536x84 = 129.024(gam)Khoi lng muoi Na2CO3 = 0.327x106 = 34.662(gam)

BAI TAP 78

Hap thu 28.806 lt kh SO2 o ktc vao 1.067 lt dung dch KOH 5.7 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)

BAI GIAI

So mol SO2 = 28.806/22.4 = 1.286(mol)So mol KOH =1.067x5.7 = 6.08(mol)So mol KOH/So mol SO2 = 4.728 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 1.286(mol)Khoi lng muoi K2SO3 = 1.286x158 = 203.188(gam)

BAI TAP 79

Hap thu V lt kh CO2 o dktc vao 0.757 lt dung dch NaOH 3.5 M thu c 171.552 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.757 x 3.5 = 2.649Khoi lng hon hp 2 muoi : 84x + 106y = 171.552Giai ra ta c : x = 1(mol) , y = 0.822(mol)Khoi lng cua muoi NaHCO3 = 1 x 84 = 84.42 (gam)Khoi lng cua muoi Na2CO3 = 0.822x106 = 87.132 (gam)

BAI TAP 80

Hap thu 17.987 lt kh CO2 o dktc vao 28.963 lt dung dch NaOH 0.27 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 17.987/22.4 = 0.803(mol)So mol NaOH =28.963x0.27 = 7.82(mol)So mol NaOH/So mol CO2 = 9.738 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.803(mol)Khoi lng muoi Na2CO3 = 0.803x106 = 85.118(gam)

BAI TAP 81

Cho m gam P2O5 tac dung vi 4.25 lt dung dch KOH 1.55 M thu c 500.01 gam 2 muoi K2HPO4 va K3PO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;K=39;H=1)

BAI GIAI

Goi x la so mol cua K2HPO4 , y la so mol cua K3PO4P2O5 + 4KOH = 2K2HPO4 + H2O (1)0.5x2x xP2O5 + 6KOH = 2K3PO4 + 3H2O (2)0.5y3yyTa co : So mol KOH : 2x + 3y = 4.25 x 1.55 = 6.587Khoi lng hon hp 2 muoi : 174x + 212y = 500.01Giai ra ta c : x = 1.057(mol) , y = 1.491(mol)Khoi lng cua muoi K2HPO4 = 1.057 x 174 = 183.918 (gam)Khoi lng cua muoi K3PO4 = 1.491x212 = 316.092 (gam)

BAI TAP 82

Hap thu 20.317 lt kh SO2 o dktc vao 364.888 gam dung dch NaOH 34.86 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 20.317/22.4 = 0.907(mol)So mol NaOH =364.888x34.86 /( 40 x 100 ) = 3.18(mol)So mol NaOH/So mol SO2 = 3.506 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.907(mol)Khoi lng muoi Na2SO3 = 0.907x126 = 114.282(gam)

BAI TAP 83

Cho m gam P2O5 tac dung vi 2.618 lt dung dch KOH 0.55 M thu c 129.592 gam 2 muoi KH2PO4 va K2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;K=39;H=1)

BAI GIAI

Goi x la so mol cua KH2PO4 , y la so mol cua K2HPO4P2O5+ 2KOH + +H2O = 2KH2PO4 (1)0.5x x xP2O5 + 4KOH = 2K2HPO4 + H2O (2)0.5y 2y yTa co : So mol KOH : x + 2y = 2.618 x 0.55 = 1.44Khoi lng hon hp 2 muoi : 136x + 174y = 129.592Giai ra ta c : x = 0.088(mol) , y = 0.676(mol)Khoi lng cua muoi KH2PO4 = 0.088 x 136 = 11.968 (gam)Khoi lng cua muoi K2HPO4 = 0.676x174 = 117.624 (gam)

BAI TAP 84

Hap thu 4.48 lt kh CO2 o dktc vao 0.307 lt dung dch NaOH 3.94 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 4.48/22.4 = 0.2(mol)So mol NaOH =0.307x3.94 = 1.21(mol)So mol NaOH/So mol CO2 = 6.05 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.2(mol)Khoi lng muoi Na2CO3 = 0.2x106 = 21.2(gam)

BAI TAP 85

Hap thu V lt kh CO2 o dktc vao 0.427 lt dung dch NaOH 2.1 M thu c 56.81 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.427 x 2.1 = 0.897Khoi lng hon hp 2 muoi : 84x + 106y = 56.81Giai ra ta c : x = 0.3(mol) , y = 0.299(mol)Khoi lng cua muoi NaHCO3 = 0.3 x 84 = 25.116 (gam)Khoi lng cua muoi Na2CO3 = 0.299x106 = 31.694 (gam)

BAI TAP 86

Hap thu V lt kh SO2 o dktc vao 0.391 lt dung dch NaOH 3.96 M thu c 118.806 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.391 x 3.96 = 1.55Khoi lng hon hp 2 muoi : 104x + 126y = 118.806Giai ra ta c : x = 0.516(mol) , y = 0.517(mol)Khoi lng cua muoi NaHSO3 = 0.516 x 104 = 53.664 (gam)Khoi lng cua muoi Na2SO3 = 0.517x126 = 65.142 (gam)

BAI TAP 87

Hap thu 41.507 lt kh CO2 o dktc vao dung dch NaOH thu c 158.512 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol CO2 : x + y = 41.507 /22.4 = 1.853Khoi lng hon hp 2 muoi : 84x + 106y = 158.512Giai ra ta c : x = 1.72(mol) , y = 0.13(mol)Khoi lng cua muoi NaHCO3 = 1.72 x 84 = 144.732 (gam)Khoi lng cua muoi Na2CO3 = 0.13x106 = 13.78 (gam)

BAI TAP 88

Hap thu 15.434 lt kh SO2 o dktc vao 49.367 gam dung dch NaOH 30.79 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 15.434/22.4 = 0.689(mol)So mol NaOH =49.367x30.79 /( 40 x 100 ) = 0.38(mol)0 < So mol NaOH/So mol SO2 = 0.552 Co 1 muoi sinh ra la : NaHSO3NaOH + SO2 = NaHSO3Ta co :So mol NaHSO3 = so mol NaOH = 0.38(mol)Khoi lng muoi NaHSO3 = 0.38x104 = 39.52(gam)

BAI TAP 89

Hap thu V lt kh SO2 o dktc vao 0.369 lt dung dch KOH 4.58 M thu c 156.514 gam 2 muoi KHSO3 va K2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;K=39;H=1)

BAI GIAI

Goi x la so mol cua KHSO3 , y la so mol cua K2SO3KOH + SO2 = KHSO3 (1)x xx2KOH + SO2 = K2SO3 + H2O (2)2yyyTa co : So mol KOH : x + 2y = 0.369 x 4.58 = 1.689Khoi lng hon hp 2 muoi : 120x + 158y = 156.514Giai ra ta c : x = 0.563(mol) , y = 0.563(mol)Khoi lng cua muoi KHSO3 = 0.563 x 120 = 67.56 (gam)Khoi lng cua muoi K2SO3 = 0.563x158 = 88.954 (gam)

BAI TAP 90

Hap thu V lt kh SO2 o dktc vao 0.122 lt dung dch NaOH 4.89 M thu c 50.422 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.122 x 4.89 = 0.596Khoi lng hon hp 2 muoi : 104x + 126y = 50.422Giai ra ta c : x = 0.314(mol) , y = 0.141(mol)Khoi lng cua muoi NaHSO3 = 0.314 x 104 = 32.656 (gam)Khoi lng cua muoi Na2SO3 = 0.141x126 = 17.766 (gam)

BAI TAP 91

Hap thu 11.379 lt kh SO2 o ktc vao 0.386 lt dung dch NaOH 4.71 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 11.379/22.4 = 0.508(mol)So mol NaOH =0.386x4.71 = 1.82(mol)So mol NaOH/So mol SO2 = 3.583 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.508(mol)Khoi lng muoi Na2SO3 = 0.508x126 = 64.008(gam)

BAI TAP 92

Hap thu 23.139 lt kh CO2 o dktc vao 1.975 lt dung dch NaOH 2.82 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 23.139/22.4 = 1.033(mol)So mol NaOH =1.975x2.82 = 5.57(mol)So mol NaOH/So mol CO2 = 5.392 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.033(mol)Khoi lng muoi Na2CO3 = 1.033x106 = 109.498(gam)

BAI TAP 93

Hap thu 34.563 lt kh CO2 o dktc vao 1.654 lt dung dch NaOH 3.58 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 34.563/22.4 = 1.543(mol)So mol NaOH =1.654x3.58 = 5.92(mol)So mol NaOH/So mol CO2 = 3.837 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.543(mol)Khoi lng muoi Na2CO3 = 1.543x106 = 163.558(gam)

BAI TAP 94

Hap thu 35.66 lt kh CO2 o dktc vao 0.837 lt dung dch KOH 4.29 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)

BAI GIAI

So mol CO2 = 35.66/22.4 = 1.592(mol)So mol KOH =0.837x4.29 = 3.59(mol)So mol KOH/So mol CO2 = 2.255 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 1.592(mol)Khoi lng muoi K2CO3 = 1.592x138 = 219.696(gam)

BAI TAP 95

Hap thu 12.253 lt kh CO2 o dktc vao 0.269 lt dung dch NaOH 1.34 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 12.253/22.4 = 0.547(mol)So mol NaOH =0.269x1.34 = 0.36(mol)0 < So mol NaOH/So mol CO2 = 0.658 Co 1 muoi sinh ra la : NaHCO3NaOH + CO2 = NaHCO3Ta co : So mol NaHCO3 = so mol NaOH = 0.36(mol)Khoi lng muoi NaHCO3 = 0.36x84 = 30.24(g)

BAI TAP 96

Cho 107.494 gam P2O5 tac dung vi lt dung dch NaOH thu c 206.67 gam 2 muoi NaH2PO4 va Na2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaH2PO4 , y la so mol cua Na2HPO4P2O5 + 2NaOH +H2O = 2NaH2PO4 (1)0.5x xxP2O5 + 4NaOH = 2Na2HPO4 + H2O (2)0.5y2yyTa co : So mol P2O5 : 0.5x + 0.5y = 107.494 /142 = 0.757Khoi lng hon hp 2 muoi : 120x + 142y = 206.67Giai ra ta c : x = 0.38(mol) , y = 1.14(mol)Khoi lng cua muoi NaH2PO4 = 0.38 x 120 = 45.36 (gam)Khoi lng cua muoi Na2HPO4 = 1.14x142 = 161.312 (gam)

BAI TAP 97

Hap thu V lt kh SO2 o dktc vao 1.17 lt dung dch NaOH 2.54 M thu c 227.826 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 1.17 x 2.54 = 2.972Khoi lng hon hp 2 muoi : 104x + 126y = 227.826Giai ra ta c : x = 0.99(mol) , y = 0.991(mol)Khoi lng cua muoi NaHSO3 = 0.99 x 104 = 102.96 (gam)Khoi lng cua muoi Na2SO3 = 0.991x126 = 124.866 (gam)

BAI TAP 98

Hap thu 12.9 lt kh CO2 o dktc vao 0.15 lt dung dch KOH 4.53 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)

BAI GIAI

So mol CO2 = 12.9/22.4 = 0.576(mol)So mol KOH =0.15x4.53 = 0.68(mol)1 < So mol KOH/So mol CO2 = 1.181 < 2 =>Co 2 muoi sinh ra la : KHCO3 K2CO3KOH + CO2 = KHCO3(1)x x x2KOH + CO2 = K2CO3 + H2O(2)2yy yGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 0.576So mol KOH : 2x + y = 0.68Giai ra ta c : x= 0.472 (mol) , y = 0.104 (mol)Khoi lng muoi KHCO3 = 0.472x100 = 47.2(gam)Khoi lng muoi K2CO3 = 0.104x138 = 14.352(gam)

BAI TAP 99

Cho 246.938 gam P2O5 tac dung vi 288.928 gam dung dch KOH 34.5 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;K=39;H=1)

BAI GIAI

So mol P2O5 = 246.938/142 = 1.739(mol)So mol KOH =288.928x34.5 /( 56 x 100 ) = 1.78(mol)0 = < So mol KOH/So mol P2O5 = 1.024 Co 1 muoi sinh ra la : KH2PO4P2O5+ 2KOH + +H2O = 2KH2PO4Ta co : So mol KH2PO4 = so mol KOH = 1.78(mol)Khoi lng muoi KH2PO4 = 1.78x136 = 242.08(gam)

BAI TAP 100

Cho m gam P2O5 tac dung vi 0.74 lt dung dch NaOH 4.87 M thu c 235.436 gam 2 muoi Na2HPO4 va Na3PO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua Na2HPO4 , y la so mol cua Na3PO4P2O5 + 4NaOH = 2Na2HPO4 + H2O (1)0.5x2x xP2O5 + 6NaOH = 2Na3PO4 + 3H2O (2)0.5y 3y yTa co : So mol NaOH : x + 2y = 0.74 x 4.87 = 3.61Khoi lng hon hp 2 muoi : 142x + 164y = 235.436Giai ra ta c : x = 1.166(mol) , y = 0.426(mol)Khoi lng cua muoi Na2HPO4 = 1.166 x 142 = 165.572 (gam)Khoi lng cua muoi Na3PO4 = 0.426x164 = 69.864 (gam)

BAI TAP 101

Hap thu 27.776 lt kh SO2 o ktc vao 1.679 lt dung dch KOH 1.68 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)

BAI GIAI

So mol SO2 = 27.776/22.4 = 1.24(mol)So mol KOH =1.679x1.68 = 2.82(mol)So mol KOH/So mol SO2 = 2.274 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 1.24(mol)Khoi lng muoi K2SO3 = 1.24x158 = 195.92(gam)

BAI TAP 102

Hap thu 25.738 lt kh SO2 o ktc vao 0.575 lt dung dch KOH 5.13 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)

BAI GIAI

So mol SO2 = 25.738/22.4 = 1.149(mol)So mol KOH =0.575x5.13 = 2.95(mol)So mol KOH/So mol SO2 = 2.567 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 1.149(mol)Khoi lng muoi K2SO3 = 1.149x158 = 181.542(gam)

BAI TAP 103

Hap thu 44.374 lt kh SO2 o dktc vao 2912 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 44.374/22.4 = 1.981(mol)So mol NaOH =2912x10 /( 40 x 100 ) = 7.28(mol)So mol NaOH/So mol SO2 = 3.675 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 1.981(mol)Khoi lng muoi Na2SO3 = 1.981x126 = 249.606(gam)

BAI TAP 104

Hap thu V lt kh CO2 o dktc vao 1.032 lt dung dch NaOH 2.02 M thu c 158.192 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 1.032 x 2.02 = 2.084Khoi lng hon hp 2 muoi : 84x + 106y = 158.192Giai ra ta c : x = 1.54(mol) , y = 0.272(mol)Khoi lng cua muoi NaHCO3 = 1.54 x 84 = 129.36 (gam)Khoi lng cua muoi Na2CO3 = 0.272x106 = 28.832 (gam)

BAI TAP 105

Hap thu 23.43 lt kh CO2 o dktc vao 0.737 lt dung dch NaOH 1.86 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 23.43/22.4 = 1.046(mol)So mol NaOH =0.737x1.86 = 1.37(mol)1 < So mol NaOH/So mol CO2 = 1.31 < 2 =>Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.046So mol NaOH : 2x + y = 1.37Giai ra ta c : x= 0.722 (mol) , y = 0.324 (mol)Khoi lng muoi NaHCO3 = 0.722x84 = 60.648(gam)Khoi lng muoi Na2CO3 = 0.324x106 = 34.344(gam)

BAI TAP 106

Cho m gam P2O5 tac dung vi 5.56 lt dung dch NaOH 0.25 M thu c 85.852 gam 2 muoi Na2HPO4 va Na3PO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua Na2HPO4 , y la so mol cua Na3PO4P2O5 + 4NaOH = 2Na2HPO4 + H2O (1)0.5x2x xP2O5 + 6NaOH = 2Na3PO4 + 3H2O (2)0.5y 3y yTa co : So mol NaOH : x + 2y = 5.56 x 0.25 = 1.39Khoi lng hon hp 2 muoi : 142x + 164y = 85.852Giai ra ta c : x = 0.302(mol) , y = 0.262(mol)Khoi lng cua muoi Na2HPO4 = 0.302 x 142 = 42.884 (gam)Khoi lng cua muoi Na3PO4 = 0.262x164 = 42.968 (gam)

BAI TAP 107

Hap thu 3.114 lt kh CO2 o dktc vao 1400 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 3.114/22.4 = 0.139(mol)So mol NaOH =1400x10 /( 40 x 100 ) = 3.5(mol)So mol NaOH/So mol CO2 = 25.18 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.139(mol)Khoi lng muoi Na2CO3 = 0.139x106 = 14.734(gam)

BAI TAP 108

Hap thu V lt kh SO2 o dktc vao 0.202 lt dung dch NaOH 4.62 M thu c 67.534 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.202 x 4.62 = 0.934Khoi lng hon hp 2 muoi : 104x + 126y = 67.534Giai ra ta c : x = 0.212(mol) , y = 0.361(mol)Khoi lng cua muoi NaHSO3 = 0.212 x 104 = 22.048 (gam)Khoi lng cua muoi Na2SO3 = 0.361x126 = 45.486 (gam)

BAI TAP 109

Hap thu 18.726 lt kh SO2 o dktc vao 289.704 gam dung dch NaOH 30.79 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 18.726/22.4 = 0.836(mol)So mol NaOH =289.704x30.79 /( 40 x 100 ) = 2.23(mol)So mol NaOH/So mol SO2 = 2.667 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.836(mol)Khoi lng muoi Na2SO3 = 0.836x126 = 105.336(gam)

BAI TAP 110

Hap thu 16.24 lt kh SO2 o ktc vao 1.128 lt dung dch NaOH 5.7 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 16.24/22.4 = 0.725(mol)So mol NaOH =1.128x5.7 = 6.43(mol)So mol NaOH/So mol SO2 = 8.869 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.725(mol)Khoi lng muoi Na2SO3 = 0.725x126 = 91.35(gam)

BAI TAP 111

Hap thu 37.274 lt kh CO2 o dktc vao 1.725 lt dung dch NaOH 4.55 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 37.274/22.4 = 1.664(mol)So mol NaOH =1.725x4.55 = 7.85(mol)So mol NaOH/So mol CO2 = 4.718 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.664(mol)Khoi lng muoi Na2CO3 = 1.664x106 = 176.384(gam)

BAI TAP 112

Hap thu V lt kh CO2 o dktc vao 0.412 lt dung dch NaOH 4.5 M thu c 98.488 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.412 x 4.5 = 1.853Khoi lng hon hp 2 muoi : 84x + 106y = 98.488Giai ra ta c : x = 0.01(mol) , y = 0.922(mol)Khoi lng cua muoi NaHCO3 = 0.01 x 84 = 0.756 (gam)Khoi lng cua muoi Na2CO3 = 0.922x106 = 97.732 (gam)

BAI TAP 113

Hap thu 38.662 lt kh CO2 o dktc vao 1072 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 38.662/22.4 = 1.726(mol)So mol NaOH =1072x10 /( 40 x 100 ) = 2.68(mol)1 < So mol NaOH/So mol CO2 = 1.553 < 2 => Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.726So mol NaOH : 2x + y = 2.68Giai ra ta c : x= 0.772 (mol) , y = 0.954 (mol)Khoi lng muoi NaHCO3 = 0.772x84 = 64.848(gam)Khoi lng muoi Na2CO3 = 0.954x106 = 101.124(gam)

BAI TAP 114

Hap thu 23.878 lt kh CO2 o dktc vao 0.9 lt dung dch NaOH 2.99 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 23.878/22.4 = 1.066(mol)So mol NaOH =0.9x2.99 = 2.69(mol)So mol NaOH/So mol CO2 = 2.523 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.066(mol)Khoi lng muoi Na2CO3 = 1.066x106 = 112.996(gam)

BAI TAP 115

Hap thu 26.947 lt kh CO2 o dktc vao dung dch NaOH thu c 112.162 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol CO2 : x + y = 26.947 /22.4 = 1.203Khoi lng hon hp 2 muoi : 84x + 106y = 112.162Giai ra ta c : x = 0.7(mol) , y = 0.505(mol)Khoi lng cua muoi NaHCO3 = 0.7 x 84 = 58.632 (gam)Khoi lng cua muoi Na2CO3 = 0.505x106 = 53.53 (gam)

BAI TAP 116

Hap thu 24.058 lt kh SO2 o dktc vao 178.351 gam dung dch NaOH 38.8 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 24.058/22.4 = 1.074(mol)So mol NaOH =178.351x38.8 /( 40 x 100 ) = 1.73(mol)1 < So mol NaOH/So mol SO2 = 1.611 < 2 =>Co 2 muoi sinh ra la : NaHSO3 Na2SO3NaOH + SO2 = NaHSO3(1)x x x2NaOH + SO2 = Na2SO3 + H2O(2)2y yyGoi x la so mol cua SO2(1) va y la so mol cua SO2(2)Ta co : So mol SO2 : x+y = 1.074So mol NaOH : 2x + y = 1.73Giai ra ta c : x= 0.418 (mol) , y = 0.656 (mol)Khoi lng muoi NaHSO3 = 0.418x104 = 43.472(g)Khoi lng muoi Na2SO3 = 0.656x126 = 82.656(gam)

BAI TAP 117

Hap thu 23.744 lt kh CO2 o dktc vao 1.911 lt dung dch NaOH 3.03 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 23.744/22.4 = 1.06(mol)So mol NaOH =1.911x3.03 = 5.79(mol)So mol NaOH/So mol CO2 = 5.462 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.06(mol)Khoi lng muoi Na2CO3 = 1.06x106 = 112.36(gam)

BAI TAP 118

Hap thu V lt kh CO2 o dktc vao 0.355 lt dung dch NaOH 5.64 M thu c 126.646 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.355 x 5.64 = 2Khoi lng hon hp 2 muoi : 84x + 106y = 126.646Giai ra ta c : x = 0.67(mol) , y = 0.667(mol)Khoi lng cua muoi NaHCO3 = 0.67 x 84 = 55.944 (gam)Khoi lng cua muoi Na2CO3 = 0.667x106 = 70.702 (gam)

BAI TAP 119

Hap thu 15.165 lt kh SO2 o dktc vao 546.465 gam dung dch NaOH 39.6 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 15.165/22.4 = 0.677(mol)So mol NaOH =546.465x39.6 /( 40 x 100 ) = 5.41(mol)So mol NaOH/So mol SO2 = 7.991 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.677(mol)Khoi lng muoi Na2SO3 = 0.677x126 = 85.302(gam)

BAI TAP 120

Hap thu 20.765 lt kh SO2 o ktc vao 2.76 lt dung dch NaOH 2.71 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 20.765/22.4 = 0.927(mol)So mol NaOH =2.76x2.71 = 7.48(mol)So mol NaOH/So mol SO2 = 8.069 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.927(mol)Khoi lng muoi Na2SO3 = 0.927x126 = 116.802(gam)

BAI TAP 121

Hap thu 27.642 lt kh CO2 o dktc vao 416.345 gam dung dch NaOH 12.97 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 27.642/22.4 = 1.234(mol)So mol NaOH =416.345x12.97 /( 40 x 100 ) = 1.35(mol)1 < So mol NaOH/So mol CO2 = 1.094 < 2 => Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.234So mol NaOH : 2x + y = 1.35Giai ra ta c : x= 1.118 (mol) , y = 0.116 (mol)Khoi lng muoi NaHCO3 = 1.118x84 = 93.912(gam)Khoi lng muoi Na2CO3 = 0.116x106 = 12.296(gam)

BAI TAP 122

Hap thu 37.632 lt kh SO2 o dktc vao 1532 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 37.632/22.4 = 1.68(mol)So mol NaOH =1532x10 /( 40 x 100 ) = 3.83(mol)So mol NaOH/So mol SO2 = 2.28 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 1.68(mol)Khoi lng muoi Na2SO3 = 1.68x126 = 211.68(gam)

BAI TAP 123

Hap thu V lt kh SO2 o dktc vao 0.047 lt dung dch NaOH 3.86 M thu c 14.03 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.047 x 3.86 = 0.183Khoi lng hon hp 2 muoi : 104x + 126y = 14.03Giai ra ta c : x = 0.061(mol) , y = 0.061(mol)Khoi lng cua muoi NaHSO3 = 0.061 x 104 = 6.344 (gam)Khoi lng cua muoi Na2SO3 = 0.061x126 = 7.686 (gam)

BAI TAP 124

Hap thu 20.339 lt kh CO2 o dktc vao 4.375 lt dung dch NaOH 0.48 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 20.339/22.4 = 0.908(mol)So mol NaOH =4.375x0.48 = 2.1(mol)So mol NaOH/So mol CO2 = 2.313 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.908(mol)Khoi lng muoi Na2CO3 = 0.908x106 = 96.248(gam)

BAI TAP 125

Hap thu 7.952 lt kh SO2 o ktc vao 0.271 lt dung dch NaOH 5.5 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 7.952/22.4 = 0.355(mol)So mol NaOH =0.271x5.5 = 1.49(mol)So mol NaOH/So mol SO2 = 4.197 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.355(mol)Khoi lng muoi Na2SO3 = 0.355x126 = 44.73(gam)

BAI TAP 126

Hap thu V lt kh CO2 o dktc vao 1.224 lt dung dch NaOH 1.15 M thu c 106.864 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 1.224 x 1.15 = 1.408Khoi lng hon hp 2 muoi : 84x + 106y = 106.864Giai ra ta c : x = 1.04(mol) , y = 0.184(mol)Khoi lng cua muoi NaHCO3 = 1.04 x 84 = 87.36 (gam)Khoi lng cua muoi Na2CO3 = 0.184x106 = 19.504 (gam)

BAI TAP 127

Hap thu 5.6 lt kh CO2 o dktc vao 880.952 gam dung dch NaOH 18.48 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 5.6/22.4 = 0.25(mol)So mol NaOH =880.952x18.48 /( 40 x 100 ) = 4.07(mol)So mol NaOH/So mol CO2 = 16.28 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.25(mol)Khoi lng muoi Na2CO3 = 0.25x106 = 26.5(gam)

BAI TAP 128

Hap thu 34.563 lt kh SO2 o ktc vao 0.155 lt dung dch KOH 2.2 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)

BAI GIAI

So mol SO2 = 34.563 / 22.4 = 1.543 (mol) So mol KOH =0.155x2.2 = 0.34(mol)0 < So mol KOH/So mol SO2 = 0.22 Co 1 muoi sinh ra la : KHSO3KOH + SO2 = KHSO3Ta co : So mol KHSO3 = so mol KOH = 0.34(mol)Khoi lng muoi KHSO3 = 0.34x120 = 40.8(gam)

BAI TAP 129

Cho m gam P2O5 tac dung vi 4.52 lt dung dch NaOH 1.32 M thu c 465.52 gam 2 muoi NaH2PO4 va Na2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaH2PO4 , y la so mol cua Na2HPO4P2O5 + 2NaOH +H2O = 2NaH2PO4 (1)0.5x xxP2O5 + 4NaOH = 2Na2HPO4 + H2O (2)0.5y2yyTa co : So mol NaOH : x + 2y = 4.52 x 1.32 = 5.97Khoi lng hon hp 2 muoi : 120x + 142y = 465.52Giai ra ta c : x = 0.85(mol) , y = 2.56(mol)Khoi lng cua muoi NaH2PO4 = 0.85 x 120 = 102 (gam)Khoi lng cua muoi Na2HPO4 = 2.56x142 = 363.52 (gam)

BAI TAP 130

Hap thu 39.894 lt kh CO2 o dktc vao 0.582 lt dung dch NaOH 4.79 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 39.894/22.4 = 1.781(mol)So mol NaOH =0.582x4.79 = 2.79(mol)1 < So mol NaOH/So mol CO2 = 1.567 < 2 =>Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.781So mol NaOH : 2x + y = 2.79Giai ra ta c : x= 0.772 (mol) , y = 1.009 (mol)Khoi lng muoi NaHCO3 = 0.772x84 = 64.848(gam)Khoi lng muoi Na2CO3 = 1.009x106 = 106.954(gam)

BAI TAP 131

Hap thu 37.274 lt kh SO2 o dktc vao 754.453 gam dung dch NaOH 28.63 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 37.274/22.4 = 1.664(mol)So mol NaOH =754.453x28.63 /( 40 x 100 ) = 5.4(mol)So mol NaOH/So mol SO2 = 3.245 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 1.664(mol)Khoi lng muoi Na2SO3 = 1.664x126 = 209.664(gam)

BAI TAP 132

Hap thu V lt kh CO2 o dktc vao 0.57 lt dung dch KOH 2.09 M thu c 99.942 gam 2 muoi KHCO3 va K2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;K=39;H=1)

BAI GIAI

Goi x la so mol cua KHCO3 , y la so mol cua K2CO3KOH + CO2 = KHCO3 (1)x xx2KOH + CO2 = K2CO3 + H2O (2)2yy yTa co : So mol KOH : x + 2y = 0.57 x 2.09 = 1.191Khoi lng hon hp 2 muoi : 100x + 138y = 99.942Giai ra ta c : x = 0.573(mol) , y = 0.309(mol)Khoi lng cua muoi KHCO3 = 0.573 x 100 = 57.3 (gam)Khoi lng cua muoi K2CO3 = 0.309x138 = 42.642 (gam)

BAI TAP 133

Hap thu 44.666 lt kh SO2 o dktc vao 60.844 gam dung dch NaOH 38.13 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 44.666/22.4 = 1.994(mol)So mol NaOH =60.844x38.13 /( 40 x 100 ) = 0.58(mol)0 < So mol NaOH/So mol SO2 = 0.291 Co 1 muoi sinh ra la : NaHSO3NaOH + SO2 = NaHSO3Ta co :So mol NaHSO3 = so mol NaOH = 0.58(mol)Khoi lng muoi NaHSO3 = 0.58x104 = 60.32(gam)

BAI TAP 134

Hap thu 19.958 lt kh SO2 o dktc vao 643.902 gam dung dch NaOH 36.9 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 19.958/22.4 = 0.891(mol)So mol NaOH =643.902x36.9 /( 40 x 100 ) = 5.94(mol)So mol NaOH/So mol SO2 = 6.667 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.891(mol)Khoi lng muoi Na2SO3 = 0.891x126 = 112.266(gam)

BAI TAP 135

Hap thu 22.714 lt kh CO2 o dktc vao dung dch NaOH thu c 102.358 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol CO2 : x + y = 22.714 /22.4 = 1.014Khoi lng hon hp 2 muoi : 84x + 106y = 102.358Giai ra ta c : x = 0.23(mol) , y = 0.781(mol)Khoi lng cua muoi NaHCO3 = 0.23 x 84 = 19.572 (gam)Khoi lng cua muoi Na2CO3 = 0.781x106 = 82.786 (gam)

BAI TAP 136

Hap thu 25.088 lt kh SO2 o ktc vao 868.04 gam dung dch KOH 26.22 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)

BAI GIAI

So mol SO2 = 25.088/22.4 = 1.12(mol)So mol KOH =868.04x26.22 /( 56 x 100 ) = 5.69(mol)So mol KOH/So mol SO2 = 5.08 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 1.12(mol)Khoi lng muoi K2SO3 = 1.12x158 = 176.96(gam)

BAI TAP 137

Hap thu 20 lt kh CO2 o dktc vao 17.225 lt dung dch KOH 0.4 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)

BAI GIAI

So mol CO2 = 20/22.4 = 0.893(mol)So mol KOH =17.225x0.4 = 6.89(mol)So mol KOH/So mol CO2 = 7.716 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 0.893(mol)Khoi lng muoi K2CO3 = 0.893x138 = 123.234(gam)

BAI TAP 138

Hap thu 6.966 lt kh CO2 o dktc vao 0.584 lt dung dch NaOH 3.87 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 6.966/22.4 = 0.311(mol)So mol NaOH =0.584x3.87 = 2.26(mol)So mol NaOH/So mol CO2 = 7.267 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.311(mol)Khoi lng muoi Na2CO3 = 0.311x106 = 32.966(gam)

BAI TAP 139

Hap thu 41.194 lt kh SO2 o dktc vao 186.559 gam dung dch NaOH 27.23 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 41.194/22.4 = 1.839(mol)So mol NaOH =186.559x27.23 /( 40 x 100 ) = 1.27(mol)0 < So mol NaOH/So mol SO2 = 0.691 Co 1 muoi sinh ra la : NaHSO3NaOH + SO2 = NaHSO3Ta co :So mol NaHSO3 = so mol NaOH = 1.27(mol)Khoi lng muoi NaHSO3 = 1.27x104 = 132.08(gam)

BAI TAP 140

Hap thu 30.262 lt kh SO2 o ktc vao 0.61 lt dung dch NaOH 0.82 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 30.262/22.4 = 1.351(mol)So mol NaOH =0.61x0.82 = 0.5(mol)0 < So mol NaOH/So mol SO2 = 0.37 Co 1 muoi sinh ra la : NaHSO3NaOH + SO2 = NaHSO3Ta co :So mol NaHSO3 = so mol NaOH = 0.5(mol)Khoi lng muoi NaHSO3 = 0.5x104 = 52(gam)

BAI TAP 141

Hap thu 11.11 lt kh CO2 o dktc vao 0.694 lt dung dch NaOH 5.27 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 11.11/22.4 = 0.496(mol)So mol NaOH =0.694x5.27 = 3.66(mol)So mol NaOH/So mol CO2 = 7.379 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.496(mol)Khoi lng muoi Na2CO3 = 0.496x106 = 52.576(gam)

BAI TAP 142

Hap thu 43.389 lt kh CO2 o dktc vao 1.61 lt dung dch NaOH 2.46 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 43.389/22.4 = 1.937(mol)So mol NaOH =1.61x2.46 = 3.96(mol)So mol NaOH/So mol CO2 = 2.044 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.937(mol)Khoi lng muoi Na2CO3 = 1.937x106 = 205.322(gam)

BAI TAP 143

Hap thu 10.73 lt kh CO2 o dktc vao 467.571 gam dung dch NaOH 27.29 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 10.73/22.4 = 0.479(mol)So mol NaOH =467.571x27.29 /( 40 x 100 ) = 3.19(mol)So mol NaOH/So mol CO2 = 6.66 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.479(mol)Khoi lng muoi Na2CO3 = 0.479x106 = 50.774(gam)

BAI TAP 144

Hap thu 5.6 lt kh CO2 o dktc vao 945.551 gam dung dch NaOH 30.12 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 5.6/22.4 = 0.25(mol)So mol NaOH =945.551x30.12 /( 40 x 100 ) = 7.12(mol)So mol NaOH/So mol CO2 = 28.48 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.25(mol)Khoi lng muoi Na2CO3 = 0.25x106 = 26.5(gam)

BAI TAP 145

Hap thu 22.467 lt kh SO2 o ktc vao 5.171 lt dung dch KOH 0.82 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)

BAI GIAI

So mol SO2 = 22.467/22.4 = 1.003(mol)So mol KOH =5.171x0.82 = 4.24(mol)So mol KOH/So mol SO2 = 4.227 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 1.003(mol)Khoi lng muoi K2SO3 = 1.003x158 = 158.474(gam)

BAI TAP 146

Hap thu 22.848 lt kh CO2 o dktc vao 6.114 lt dung dch NaOH 0.35 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 22.848/22.4 = 1.02(mol)So mol NaOH =6.114x0.35 = 2.14(mol)So mol NaOH/So mol CO2 = 2.098 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.02(mol)Khoi lng muoi Na2CO3 = 1.02x106 = 108.12(gam)

BAI TAP 147

Hap thu V lt kh CO2 o dktc vao 0.078 lt dung dch NaOH 3.28 M thu c 21.11 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.078 x 3.28 = 0.255Khoi lng hon hp 2 muoi : 84x + 106y = 21.11Giai ra ta c : x = 0.25(mol) , y = 0.005(mol)Khoi lng cua muoi NaHCO3 = 0.25 x 84 = 20.58 (gam)Khoi lng cua muoi Na2CO3 = 0.005x106 = 0.53 (gam)

BAI TAP 148

Hap thu V lt kh SO2 o dktc vao 0.036 lt dung dch NaOH 5.05 M thu c 13.762 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.036 x 5.05 = 0.182Khoi lng hon hp 2 muoi : 104x + 126y = 13.762Giai ra ta c : x = 0.056(mol) , y = 0.063(mol)Khoi lng cua muoi NaHSO3 = 0.056 x 104 = 5.824 (gam)Khoi lng cua muoi Na2SO3 = 0.063x126 = 7.938 (gam)

BAI TAP 149

Cho m gam P2O5 tac dung vi 0.1 lt dung dch NaOH 4.63 M thu c 40.72 gam 2 muoi NaH2PO4 va Na2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaH2PO4 , y la so mol cua Na2HPO4P2O5 + 2NaOH +H2O = 2NaH2PO4 (1)0.5x xxP2O5 + 4NaOH = 2Na2HPO4 + H2O (2)0.5y2yyTa co : So mol NaOH : x + 2y = 0.1 x 4.63 = 0.47Khoi lng hon hp 2 muoi : 120x + 142y = 40.72Giai ra ta c : x = 0.15(mol) , y = 0.16(mol)Khoi lng cua muoi NaH2PO4 = 0.15 x 120 = 18 (gam)Khoi lng cua muoi Na2HPO4 = 0.16x142 = 22.72 (gam)

BAI TAP 150

Hap thu 10.349 lt kh SO2 o ktc vao 0.832 lt dung dch NaOH 3.52 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 10.349/22.4 = 0.462(mol)So mol NaOH =0.832x3.52 = 2.93(mol)So mol NaOH/So mol SO2 = 6.342 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.462(mol)Khoi lng muoi Na2SO3 = 0.462x126 = 58.212(gam)

BAI TAP 151

Hap thu V lt kh SO2 o dktc vao 0.445 lt dung dch KOH 3.99 M thu c 164.576 gam 2 muoi KHSO3 va K2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;K=39;H=1)

BAI GIAI

Goi x la so mol cua KHSO3 , y la so mol cua K2SO3KOH + SO2 = KHSO3 (1)x xx2KOH + SO2 = K2SO3 + H2O (2)2yyyTa co : So mol KOH : x + 2y = 0.445 x 3.99 = 1.776Khoi lng hon hp 2 muoi : 120x + 158y = 164.576Giai ra ta c : x = 0.592(mol) , y = 0.592(mol)Khoi lng cua muoi KHSO3 = 0.592 x 120 = 71.04 (gam)Khoi lng cua muoi K2SO3 = 0.592x158 = 93.536 (gam)

BAI TAP 152

Hap thu 32.166 lt kh CO2 o dktc vao dung dch KOH thu c 170.884 gam 2 muoi KHCO3 va K2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;K=39;H=1)

BAI GIAI

Goi x la so mol cua KHCO3 , y la so mol cua K2CO3KOH + CO2 = KHCO3 (1)x xx2KOH + CO2 = K2CO3 + H2O (2)2yy yTa co : So mol CO2 : x + y = 32.166 /22.4 = 1.436Khoi lng hon hp 2 muoi : 100x + 138y = 170.884Giai ra ta c : x = 0.718(mol) , y = 0.718(mol)Khoi lng cua muoi KHCO3 = 0.718 x 100 = 71.8 (gam)Khoi lng cua muoi K2CO3 = 0.718x138 = 99.084 (gam)

BAI TAP 153

Hap thu 17.05 lt kh CO2 o dktc vao 1.333 lt dung dch KOH 0.18 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)

BAI GIAI

So mol CO2 = 17.05/22.4 = 0.761(mol)So mol KOH =1.333x0.18 = 0.24(mol)0 < So mol KOH/So mol CO2 = 0.315 < = 1 => Co 1 muoi sinh ra la : KHCO3KOH + CO2 = KHCO3Ta co : So mol KHCO3 = so mol KOH = 0.24(mol)Khoi lng muoi KHCO3 = 0.24x100 = 24(gam)

BAI TAP 154

Cho 282.864 gam P2O5 tac dung vi 1.355 lt dung dch KOH 3.75 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;K=39;H=1)

BAI GIAI

So mol P2O5 = 282.864/142 = 1.992(mol)So mol KOH =1.355x3.75 = 5.08(mol)2 < So mol KOH/So mol P2O5 = 2.55 < 4 =>Co 2 muoi sinh ra la : KH2PO4 K2HPO4P2O5+ 2KOH + +H2O = 2KH2PO4(1)x 2x2xP2O5 + 4KOH = 2K2HPO4 + H2O(2)y4y2yGoi x la so mol cua P2O5(1) va y la so mol cua P2O5(2)Ta co : So mol P2O5 : x+y = 1.992So mol KOH : 2x + 4y = 5.08Giai ra ta c : x= 1.444 (mol) , y = 0.548 (mol)Khoi lng muoi KH2PO4 = 2x1.444x136 = 392.768(gam)Khoi lng muoi K2HPO4 = 2x0.548x174 = 190.704(gam)

BAI TAP 155

Cho m gam P2O5 tac dung vi 2.57 lt dung dch NaOH 1.43 M thu c 286.15 gam 2 muoi NaH2PO4 va Na2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaH2PO4 , y la so mol cua Na2HPO4P2O5 + 2NaOH +H2O = 2NaH2PO4 (1)0.5x xxP2O5 + 4NaOH = 2Na2HPO4 + H2O (2)0.5y2yyTa co : So mol NaOH : x + 2y = 2.57 x 1.43 = 3.67Khoi lng hon hp 2 muoi : 120x + 142y = 286.15Giai ra ta c : x = 0.52(mol) , y = 1.57(mol)Khoi lng cua muoi NaH2PO4 = 0.52 x 120 = 62.64 (gam)Khoi lng cua muoi Na2HPO4 = 1.57x142 = 223.508 (gam)

BAI TAP 156

Cho 128.226 gam P2O5 tac dung vi 2.364 lt dung dch KOH 3.24 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;K=39;H=1)

BAI GIAI

So mol P2O5 = 128.226/142 = 0.903(mol)So mol KOH =2.364x3.24 = 7.66(mol)So mol KOH/So mol P2O5 = 8.483 >= 6 =>Co 1 muoi sinh ra la : K3PO4P2O5 + 6KOH = 2K3PO4 + 3H2OTa co : So mol K3PO4 = 2 x so mol P2O5 = 2 x 0.903 = 1.806(mol)Khoi lng muoi K3PO4 = 1.806x212 = 382.872(g)

BAI TAP 157

Hap thu 22.85 lt kh CO2 o dktc vao 10.912 lt dung dch KOH 0.57 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)

BAI GIAI

So mol CO2 = 22.85/22.4 = 1.02(mol)So mol KOH =10.912x0.57 = 6.22(mol)So mol KOH/So mol CO2 = 6.098 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 1.02(mol)Khoi lng muoi K2CO3 = 1.02x138 = 140.76(gam)

BAI TAP 158

Hap thu 5.6 lt kh SO2 o ktc vao 1.198 lt dung dch KOH 3.78 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)

BAI GIAI

So mol SO2 = 5.6/22.4 = 0.25(mol)So mol KOH =1.198x3.78 = 4.53(mol)So mol KOH/So mol SO2 = 18.12 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 0.25(mol)Khoi lng muoi K2SO3 = 0.25x158 = 39.5(gam)

BAI TAP 159

Hap thu 32.883 lt kh SO2 o ktc vao 0.875 lt dung dch KOH 3.83 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)

BAI GIAI

So mol SO2 = 32.883/22.4 = 1.468(mol)So mol KOH =0.875x3.83 = 3.35(mol)So mol KOH/So mol SO2 = 2.282 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 1.468(mol)Khoi lng muoi K2SO3 = 1.468x158 = 231.944(gam)

BAI TAP 160

Hap thu V lt kh SO2 o dktc vao 0.067 lt dung dch KOH 4.94 M thu c 31.072 gam 2 muoi KHSO3 va K2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;K=39;H=1)

BAI GIAI

Goi x la so mol cua KHSO3 , y la so mol cua K2SO3KOH + SO2 = KHSO3 (1)x xx2KOH + SO2 = K2SO3 + H2O (2)2yyyTa co : So mol KOH : x + 2y = 0.067 x 4.94 = 0.33Khoi lng hon hp 2 muoi : 120x + 158y = 31.072Giai ra ta c : x = 0.122(mol) , y = 0.104(mol)Khoi lng cua muoi KHSO3 = 0.122 x 120 = 14.64 (gam)Khoi lng cua muoi K2SO3 = 0.104x158 = 16.432 (gam)

BAI TAP 161

Hap thu 5.578 lt kh CO2 o dktc vao 0.489 lt dung dch NaOH 3.33 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 5.578/22.4 = 0.249(mol)So mol NaOH =0.489x3.33 = 1.63(mol)So mol NaOH/So mol CO2 = 6.546 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.249(mol)Khoi lng muoi Na2CO3 = 0.249x106 = 26.394(gam)

BAI TAP 162

Cho 80.514 gam P2O5 tac dung vi 0.466 lt dung dch KOH 2.19 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;K=39;H=1)

BAI GIAI

So mol P2O5 = 80.514/142 = 0.567(mol)So mol KOH =0.466 x 2.19 = 1.02(mol)0 = < So mol KOH/So mol P2O5 = 1.799 Co 1 muoi sinh ra la : KH2PO4P2O5+ 2KOH + +H2O = 2KH2PO4Ta co : So mol KH2PO4 = so mol KOH = 1.02(mol)Khoi lng muoi KH2PO4 = 1.02x136 = 138.72(gam)

BAI TAP 163

Cho m gam P2O5 tac dung vi 11.64 lt dung dch NaOH 0.59 M thu c 535.89 gam 2 muoi NaH2PO4 va Na2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaH2PO4 , y la so mol cua Na2HPO4P2O5 + 2NaOH +H2O = 2NaH2PO4 (1)0.5x xxP2O5 + 4NaOH = 2Na2HPO4 + H2O (2)0.5y2yyTa co : So mol NaOH : x + 2y = 11.64 x 0.59 = 6.87Khoi lng hon hp 2 muoi : 120x + 142y = 535.89Giai ra ta c : x = 0.98(mol) , y = 2.94(mol)Khoi lng cua muoi NaH2PO4 = 0.98 x 120 = 117.84 (gam)Khoi lng cua muoi Na2HPO4 = 2.94x142 = 418.048 (gam)

BAI TAP 164

Hap thu V lt kh CO2 o dktc vao 0.33 lt dung dch NaOH 3.48 M thu c 78.846 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.33 x 3.48 = 1.149Khoi lng hon hp 2 muoi : 84x + 106y = 78.846Giai ra ta c : x = 0.58(mol) , y = 0.285(mol)Khoi lng cua muoi NaHCO3 = 0.58 x 84 = 48.636 (gam)Khoi lng cua muoi Na2CO3 = 0.285x106 = 30.21 (gam)

BAI TAP 165

Hap thu 2.867 lt kh SO2 o ktc vao 0.508 lt dung dch NaOH 4.13 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 2.867/22.4 = 0.128(mol)So mol NaOH =0.508x4.13 = 2.1(mol)So mol NaOH/So mol SO2 = 16.406 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.128(mol)Khoi lng muoi Na2SO3 = 0.128x126 = 16.128(gam)

BAI TAP 166

Hap thu V lt kh SO2 o dktc vao 0.143 lt dung dch NaOH 2.57 M thu c 25.562 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.143 x 2.57 = 0.368Khoi lng hon hp 2 muoi : 104x + 126y = 25.562Giai ra ta c : x = 0.058(mol) , y = 0.155(mol)Khoi lng cua muoi NaHSO3 = 0.058 x 104 = 6.032 (gam)Khoi lng cua muoi Na2SO3 = 0.155x126 = 19.53 (gam)

BAI TAP 167

Hap thu 37.99 lt kh SO2 o ktc vao 1.052 lt dung dch KOH 3.05 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)

BAI GIAI

So mol SO2 = 37.99/22.4 = 1.696(mol)So mol KOH =1.052x3.05 = 3.21(mol)1 < So mol KOH/So mol SO2 = 1.893 < 2 =>Co 2 muoi sinh ra la : KHSO3 K2SO3KOH + SO2 = KHSO3(1)x xx2KOH + SO2 = K2SO3 + H2O(2)2yyyGoi x la so mol cua SO2(1) va y la so mol cua SO2(2)Ta co : So mol SO2 : x+y = 1.696So mol KOH : 2x + y = 3.21Giai ra ta c : x= 0.182 (mol) , y = 1.514 (mol)Khoi lng muoi KHSO3 = 0.182x120 = 21.84(gam)Khoi lng muoi K2SO3 = 1.514x158 = 239.212(gam)

BAI TAP 168

Hap thu 42.403 lt kh SO2 o ktc vao 0.1 lt dung dch NaOH 4.4 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)

BAI GIAI

So mol SO2 = 42.403/22.4 = 1.893(mol)So mol NaOH =0.1x4.4 = 0.44(mol)0 < So mol NaOH/So mol SO2 = 0.232 Co 1 muoi sinh ra la : NaHSO3NaOH + SO2 = NaHSO3Ta co :So mol NaHSO3 = so mol NaOH = 0.44(mol)Khoi lng muoi NaHSO3 = 0.44x104 = 45.76(gam)

BAI TAP 169

Cho 87.756 gam P2O5 tac dung vi 7.046 lt dung dch NaOH 1.08 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)

BAI GIAI

So mol P2O5 = 87.756/142 = 0.618(mol)So mol NaOH =7.046x1.08 = 7.61(mol)So mol NaOH/So mol P2O5 = 12.314 > = 6 => Co 1 muoi sinh ra la : Na3PO4P2O5 + 6NaOH = 2Na3PO4 + 3H2OTa co : So mol Na3PO4 = 2 x so mol P2O5 = 2 x 0.618 = 1.24(mol)Khoi lng muoi Na3PO4 = 1.24x164 = 202.7(gam)

BAI TAP 170

Cho 219.39 gam P2O5 tac dung vi 0.61 lt dung dch NaOH 2.54 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)

BAI GIAI

So mol P2O5 = 219.39/142 = 1.545(mol)So mol NaOH =0.61x2.54 = 1.55(mol)0 = < So mol NaOH/So mol P2O5 = 1.003 Co 1 muoi sinh ra la : NaH2PO4P2O5 + 2NaOH +H2O = 2NaH2PO4Ta co : So mol NaH2PO4 = so mol NaOH = 1.55(mol)Khoi lng muoi NaH2PO4 = 1.55x120 = 186(gam)

BAI TAP 171

Hap thu 29.77 lt kh CO2 o dktc vao 0.355 lt dung dch NaOH 5.33 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)

BAI GIAI

So mol CO2 = 29.77/22.4 = 1.329(mol)So mol NaOH =0.355x5.33 = 1.89(mol)1 < So mol NaOH/So mol CO2 = 1.422 < 2 =>Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.329So mol NaOH : 2x + y = 1.89Giai ra ta c : x= 0.768 (mol) , y = 0.561 (mol)Khoi lng muoi NaHCO3 = 0.768x84 = 64.512(gam)Khoi lng muoi Na2CO3 = 0.561x106 = 59.466(gam)

BAI TAP 172

Cho 29.962 gam P2O5 tac dung vi 625.159 gam dung dch NaOH 15.74 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)

BAI GIAI

So mol P2O5 = 29.962/142 = 0.211(mol)So mol NaOH =625.159x15.74 = 2.46(mol)So mol NaOH/So mol P2O5 = 11.659 > = 6 => Co 1 muoi sinh ra la : Na3PO4P2O5 + 6NaOH = 2Na3PO4 + 3H2OTa co : So mol Na3PO4 = 2 x so mol P2O5 = 2 x 0.211 = 0.42(mol)Khoi lng muoi Na3PO4 = 0.42x164 = 69.21(gam)

BAI TAP 173

Cho 45.582 gam P2O5 tac dung vi lt dung dch NaOH thu c 88.44 gam 2 muoi NaH2PO4 va Na2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaH2PO4 , y la so mol cua Na2HPO4P2O5 + 2NaOH +H2O = 2NaH2PO4 (1)0.5x xxP2O5 + 4NaOH = 2Na2HPO4 + H2O (2)0.5y2yyTa co : So mol P2O5 : 0.5x + 0.5y = 45.582 /142 = 0.321Khoi lng hon hp 2 muoi : 120x + 142y = 88.44Giai ra ta c : x = 0.12(mol) , y = 0.52(mol)Khoi lng cua muoi NaH2PO4 = 0.12 x 120 = 14.88 (gam)Khoi lng cua muoi Na2HPO4 = 0.52x142 = 73.556 (gam)

BAI TAP 174

Hap thu 40.342 lt kh SO2 o ktc vao 0.53 lt dung dch KOH 5.23 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)

BAI GIAI

So mol SO2 = 40.342/22.4 = 1.801(mol)So mol KOH =0.53x5.23 = 2.77(mol)1 < So mol KOH/So mol SO2 = 1.538 < 2 =>Co 2 muoi sinh ra la : KHSO3 K2SO3KOH + SO2 = KHSO3(1)x xx2KOH + SO2 = K2SO3 + H2O(2)2yyyGoi x la so mol cua SO2(1) va y la so mol cua SO2(2)Ta co : So mol SO2 : x+y = 1.801So mol KOH : 2x + y = 2.77Giai ra ta c : x= 0.832 (mol) , y = 0.969 (mol)Khoi lng muoi KHSO3 = 0.832x120 = 99.84(gam)Khoi lng muoi K2SO3 = 0.969x158 = 153.102(gam)

BAI TAP 175

Cho 35.5 gam P2O5 tac dung vi 1.491 lt dung dch KOH 5.28 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;K=39;H=1)

BAI GIAI

So mol P2O5 = 35.5/142 = 0.25(mol)So mol KOH =1.491x5.28 = 7.87(mol)So mol KOH/So mol P2O5 = 31.48 >= 6 =>Co 1 muoi sinh ra la : K3PO4P2O5 + 6KOH = 2K3PO4 + 3H2OTa co : So mol K3PO4 = 2 x so mol P2O5 = 2 x 0.25 = 0.5(mol)Khoi lng muoi K3PO4 = 0.5x212 = 106(g)

BAI TAP 176

Hap thu V lt kh CO2 o dktc vao 1.938 lt dung dch NaOH 1.24 M thu c 152.19 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)

BAI GIAI

Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaO