CHUYÊN ĐỀ BÀI TẬP TỔNG HỢP ĐẠI CƯƠNG KIM LOẠI

8/2/2019 CHUYN BI TP TNG HP I CNG KIM LOI

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GV: Trn Vn Tn (T: 0984532986) BI DNG KIN THC HO 12 - LTH

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H tn HS:

CHUYN BI TP TNG HP

PHN I CNG KIM LOI

I) KIM LOI (V TR, CU TO), HP KIM, TNH CHT CA KIM LOI

Cu 1: Cho 4 nguyn t K (Z = 19), Mn (Z = 25), Cu (Z = 29), Cr (Z = 24). Nguyn t ca nguyn t kim lochuyn tip no c cu hnh electron lp ngoi cng l 4s1?

A. K. B. Cu, Cr. C. K, Cu, Cr. D. K, Cu.Cu 2: Nguyn t X, cation 2Y + , anion Z u c cu hnh electron 1s22s226. X, Y, Z l kim loi hay phi kim?

A. X l phi kim, Y l kh him, Z l kim loi. B. X l kh him, Y l phi kim, Z l kim loi.

C. X l kh him, Y l kim loi, Z l phi kim. D. A, B, C u ng.Cu 3: Cu hnh electron no sau y l ca nguyn t kim loi?A. 1s22s22p63s23p4. B. 1s22s22p63s23p5. C. 1s22s22p63s1. D. 1s22s22p6.

Cu 4: Nhn nh no khng ng v v tr ca kim loi trong bng tun hon:A. Tr H (nhm IA), Bo (nhm IIIA), tt c cc nguyn t nhm IA, IIA, IIIA u l kim loi.B. Tt c cc nguyn t nhm B t IB n VIIIB.C. Tt c cc nguyn t h Lantan v Actini.D. Mt phn cc nguyn t pha trn ca nhm IVA, VA v VIA.

Cu 5: Trong 110 nguyn t bit, c ti gn 90 nguyn t l kim loi. Cc nguyn t kim loi c cu hnelectron lp ngoi cng l

A. bo ho. B. gn bo ho. C. t electron. D. nhiu electron.

Cu 6: Kim loi c nhng tnh cht vt l chung no sau y?A. Tnh do, tnh dn in, tnh cng.B. Tnh dn in, tnh dn nhit, tnh do, c nh kim.C. Tnh do, tnh dn in, nhit nng chy cao.D. C nh kim, tnh dn in, c khi lng ring nh.

Cu 7: Cho cc kim loi: Al, Au, Ag, Cu. Kim loi do nht, d dt mng, ko di nht lA. Al. B. Ag. C. Au. D. Cu.

Cu 8: Kim loi c nhit nng chy cc nht dng lm dy tc bng n lA. Au. B. Pt. C. Cr. D. W.

Cu 9: Dy so snh tnh cht vt l ca kim loi no di y l khng ng?A. Nhit nng chy: Hg < Al < W. B. Tnh dn in v nhit: Fe < Al < Au < Cu < Ag.C. Tnh cng: Cs < Fe < W < Cr. D. Tnh do: Al < Au < Ag.

Cu 10: Cho cc kiu mng tinh th sau: (1) lp phng tm khi; (2) lp phng tm din; (3) t din u; (4lc phng. a s cc kim loi c cu to theo 3 kiu mng tinh th l

A. (1), (2), (3). B. (1), (2), (4). C. (2), (3), (4). D. (1), (3), (4).Cu 11: Cho cc kim loi sau: Au, Al, Cu, Ag, Fe. Dy gm cc kim loi c sp xp theo chiu tng dn tndn in ca cc kim loi trn l

A. Fe, Cu, Al, Ag, Au. B. Cu, Fe, Al, Au, Ag.C. Fe, Al, Au, Cu, Ag. D. Au, Fe, Cu, Al, Ag.

Cu 12: Trc y, ngi ta thng dng nhng tm gng soi bng Cu v Cu l kim loiA. c tnh do. B. c tnh dn nhit tt.C. c kh nng phn x tt nh sng. D. km hot ng, c tnh kh yu.


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Cu 13: Kt lun no sau y khng ng v hp kim?A. Tnh cht ca hp kim ph thuc vo thnh phn ca cc n cht tham gia hp kim v cu to mng tinth ca hp kim.B. Hp kim l vt liu kim loi c cha 1 hay nhiu nguyn t (kim loi hoc phi kim).C. Thp l hp kim ca Fe v C.D. Nhn chung hp kim c nhng tnh cht ho hc khc tnh cht ca cc cht tham gia to thnh hp kim.

Cu 14: Nhn nh no sau y khng ng v hp kim?A. Trong tinh th hp kim c lin kt kim loi do hp kim c nhng tnh cht ca kim loi nh: dn indn nhit, nh kim.B. Hp kim dn in v dn nhit km hn kim loi nguyn cht do nhng nguyn t kim loi thnh phn cbn knh khc nhau lm bin dng mng tinh th, cn tr s di chuyn t do ca cc electron.C. cng ca hp kim ln hn kim loi thnh phn.D. Nhit nng chy ca hp kim cao hn nhit nng chy ca cc kim loi thnh phn.

Cu 15: Tnh cht vt l no di y ca kim loi khng phi do cc electron t do trong kim loi gy ra?A. Tnh cng. B. Tnh do.C. Tnh dn in, dn nhit. D. nh kim.

Cu 16: Tnh cht vt l no sau y ca kim loi do electron t do trong kim loi gy ra?

A. nhit nng chy. B. khi lng ring. C. tnh do. D. tnh cng.Cu 17: Tnh cht ho hc c trng ca kim loi l

A. b oxi ho. B. tnh oxi ho.C. b kh. D. va th hin tnh oxi ho va th hin tnh kh.

Cu 18: Nguyn t kim loi c xu hng no sau y?A. Nhng electron to thnh ion m. B. Nhng electron to thnh ion dng.C. Nhn electron to thnh ion m. D. Nhn electron to thnh ion dng.

Cu 19: Tnh cht c trng ca kim loi l tnh kh (d b oxi ho thnh ion dng) vA. Nguyn t kim loi thng c 5, 6, 7 electron lp ngoi cng.B. Nguyn t kim loi c nng lng ion ho nh.C. Kim loi c xu hng thu thm electron t cu hnh ca kh him.

D. Nguyn t kim loi c m in ln.Cu 20: Mng tinh th kim loi gm cA. nguyn t, ion kim loi v cc e c thn. B. nguyn t, ion kim loi v cc e t do.C. nguyn t kim loi v cc e c thn. D. ion kim loi v cc electron c thn.

Cu 21: Trong cc loi tinh th, tinh th no dn in v dn nhit iu kin thng?A. tinh th kim loi. B. tinh nguyn t. C. tinh th phn t. D. tinh th ion.

Cu 22: Khi lng ring ca tinh th Na l 0,97 g/cm3. Th tch ca mt nguyn t Na lA. 23,71 cm3. B. 2,94.10-23 cm3. C. 2,68.10-23 cm3. D. 3,94.10-23 cm3.

Cu 23: Mt kim loi M kt tinh theo mng lp phng tm khi c cnh hnh lp phng l 2,866o

A , khlng ring ca M trng thi tinh th l 7,9 g/cm3. M l

A. Cu. B. Fe. C. Cr. D. Mn.

Cu 24: Mt kim loi M kt tinh theo mng lp phng tm khi c cnh hnh lp phng l 5,32o

A , khi lnring ca M trng thi tinh th l 0,86 g/cm3. M l

A. K. B. Li. C. Na. D. Rb.Cu 25 (C - 2010): Dy gm cc kim loi c cu to mng tinh th lp phng tm khi l

A. Li, Na, Ca. B. Na, K, Mg. C. Be, Mg, Ca. D. Li, Na, K.Cu 26: Pht biu no sau y l ph hp vi tnh cht ho hc chung ca kim loi?

A. kim loi c tnh kh, n b kh thnh ion m.B. kim loi c tnh oxi ho, n b oxi ho thnh ion dng.C. kim loi c tnh kh, n b oxi ho thnh ion dng.D. kim loi c tnh oxi ho, n b kh thnh ion m.


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Cu 27: So vi nguyn t phi kim cng chu k, nguyn t kim loiA. thng c bn knh nguyn t nh hn.B. thng d nhn electron trong cc phn ng ho hc.C. thng c nng lng ion ho nh hn.D. thng c s electron cc phn lp ngoi cng nhiu hn.

Cu 28: Kim loi no sau y c tnh dn in tt nht trong tt c cc kim loi?

A. Vng. B. Bc. C. ng. D. Nhm.Cu 29: Kim loi no sau y l kim loi cng nht trong tt c cc kim loi?

A. Vonfam. B. Crom. C. St. D. ng.Cu 30: Kim loi no sau y l kim loi mm nht trong tt c cc kim loi?

A. Li. B. Xe. C. Na. D. K.Cu 31: Kim loi no sau y c nhit nng chy cao nht trong tt c cc kim loi?

A. W. B. Fe. C. Cu. D. Zn.Cu 32: Cho cc cu hnh electron nguyn t sau: (a) 1s22s22p63s1; (b) 1s22s22p3; (c) 1s22s22p63s23p5; (d1s22s22p63s23p6; (e) 1s22s22p63s23p63d64s2; (g) 1s22s22p63s23p3.

C bao nhiu cu hnh l nguyn t kim loi?A. 1. B. 2. C. 3. D. 4.

Cu 33: S hiu nguyn t Z ca cc nguyn t M, N, P, Q ln lt l 6, 7, 20, 19. Nhn xt no di y lng?

A. C 4 nguyn t u thuc mt chu k. B. N, P thuc chu k 3.C. P, Q thuc chu k 4. D. Q thuc chu k 3.

Cu 34: S hiu nguyn t Z ca cc nguyn t M, N, P, Q ln lt l 6, 7, 20, 19. Nhn xt no di y lng?

A. M thuc nhm VA. B. N thuc nhm IIIA. C. P thuc nhm IIB. D. Q thuc nhm IA.Cu 35: Trong bng tun hon, nguyn t X c s th t l 16, nguyn t X thuc

A. chu k 3, nhm IVA. B. chu k 4, nhm VIA. C. chu k 3, nhm VIA. D. Chu k 4, nhm IIIA.Cu 36: Trong nhng cu sau, cu no ng?

A. Trong hp kim c lin kt kim loi hoc l lin kt ion.

B. Tnh cht ca hp kim khng ph thuc vo thnh phn cu to ca hp kim.C. Hp kim c tnh cht ho hc tng t tnh cht ca cc kim loi to ra chng.D. Hp kim c tnh cht vt l v tnh c hc khc t cc kim loi to ra chng.

Cu 37: Trong nhng cu sau, cu no khng ng?A. Tnh dn in, dn nhit ca hp kim tt hn cc kim loi to ra chng.B. Khi to thnh lin kt cng ho tr, mt electron t do trong kim loi gim.C. Hp kim thng c cng v dn hn cc kim loi to ra chng.D. Nhit nng chy ca hp kim thng thp hn so vi cc kim loi to ra chng.

Cu 38: Mt loi ng thau cha 60% Cu v 40% Zn. Hp kim ny c cu to tinh th hp cht ho hc. Cnthc ho hc ca hp kim l

A. CuZn2. B. Cu2Zn. C. Cu2Zn3. D. Cu3Zn2.

Cu 39: Kt lun no sau y khng ng v tnh cht ca hp kim?A. Lin kt trong a s tinh th hp kim vn l lin kt kim loi.B. Hp kim thng dn in, dn nhit tt hn kim loi nguyn cht.C. cng ca hp kim thng ln hn cng ca kim loi nguyn cht.D. Nhit nng chy ca hp kim thng thp hn nhit nng chy ca kim loi nguyn cht.

Cu 40: Ho tan 6 gam kim loi Cu-Ag trong dung dch HNO3 to ra c 14,68 gam hn hp mui Cu(NO3)v AgNO3. Thnh phn phn trm khi lng ca hp kim l

A. 50% Cu v 50 Ag. B. 64% Cu v 36% Ag. C. 36% Cu v 64% Ag. D. 60% Cu v 40% Ag.Cu 41: Ho tan 1,44 gam mt kim loi ho tr II trong 150 ml dung dch H 2SO4 0,5M. trung ho axit dtrong dung dch thu c, phi dng ht 30 ml dung dch NaOH 1M. Kim loi l

A. Ba. B. Ca. C. Mg. D. Be.


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Cu 42: Ho tan hon ton 15,4 gam hn hp Mg v Zn trong dung dch HCl d thy c 0,6 gam kh H 2 bay raKhi lng mui to ra trong dung dch l

A. 36,7 gam. B. 35,7 gam. C. 63,7 gam. D. 53,7 gam.Cu 43: Ngm mt inh st trong 100 ml dung dch CuCl2 1M, gi thit Cu to ra bm ht vo inh st. Sau khphn ng xong ly inh st ra, sy kh, khi lng inh st tng thm

A. 15,5 gam. B. 0,8 gam. C. 2,7 gam. D. 2,4 gam.

Cu 44: Cho 1,4 gam kim loi X tc dng vi dung dch HCl thu c dung dch mui trong kim loi c soxi ho +2 v 0,56 lt H2 (ktc). Kim loi X l

A. Mg. B. Zn. C. Fe. D. Ni.Cu 45: Nung nng 16,8 gam bt st v 6,4 gam bt lu hunh (khng c khng kh) thu c sn phm X. ChX tc dng vi dung dch HCl d th thu c V lt kh thot ra ( ktc). Cc phn ng xy ra hon ton. Gi trca V l

A. 2,24. B. 4,48. C. 6,72. D. 1,12.

P N: KIM LOI (V TR, CU TO), HP KIM, TNH CHT CA KIM LOI

1) B 2) C 3) C 4) D 5) C 6) B 7) C 8) D 9) D 10) B

11) C 12) C 13) D 14) D 15) A 16) C 17) A 18) B 19) B 20) B

21) A 22) C 23) B 24) A 25) D 26) C 27) C 28) B 29) B 30) A

31) A 32) B 33) C 34) D 35) C 36) D 37) A 38) D 39) B 40) B

41) C 42) A 43) B 44) C 45) C

II) DY IN HO CA KIM LOICu 1: Dy gm cc ion xp theo chiu tng dn tnh oxi ha l

A. Zn2+, Cu2+, Fe2+, Ag+. B. Zn2+, Cu2+, Fe2+, Ag+.C. Zn2+, Fe2+, Cu2+, Ag+. D. Fe2+, Zn2+, Cu2+, Ag+.

Cu 2: Cho cc phn ng ha hc sau: Fe + Cu2+ Fe2+ + Cu ; Cu + 2Fe3+ Cu2+ + 2Fe2+.Nhn xt no say sai?

A. Tnh kh ca Fe mnh hn Cu. B. Tnh oxi ha ca Fe3+ mnh hn Cu2+.C. Tnh oxi ha ca Fe2+ yu hn Cu2+. D. Tnh kh ca Cu yu hn Fe2+.

Cu 3: Cho hn hp gm Fe v Zn vo dung dch AgNO3 n khi cc phn ng xy ra hon ton, thu dung dch X gm hai mui v cht rn Y gm hai kim loi. Hai mui trong X l

A. Fe(NO3)3v Zn(NO3)2. B. Zn(NO3)2v Fe(NO3)2.C. AgNO3v Zn(NO3)2. D. Fe(NO3)2v AgNO3.

Cu 4:Bit th t ca cc cp oxi ha - kh trong dy in ha c sp xp theo chiu tng dn tnh oxi ho ccc ion nh sau: Ag+/Ag, Fe3+/Fe2+, Cu2+/Cu, Fe2+/Fe. Cp cht no sau y khng xy ra phn ng ha hc?

A. Ag+ + Fe2+. B. Ag+ + Cu. C. Cu + Fe3+. D. Cu2+ + Fe2+.Cu 5: Khi lng thanh st gim i trong trng hp nhng vo dung dch no sau y ?

A. Fe2(SO4)3. B. CuSO4. C. AgNO3. D. MgCl2.Cu 6: Dy gm cc kim loi ch kh c Fe(III) v Fe(II) trong dung dch mui l :

A. Mg, Al. B. Fe, Cu. C. Cu, Ag. D. Mg, Fe.


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Cu 7: Ngm hn hp hai kim loi gm Zn, Fe vo dung dch CuSO4. Sau khi kt thc phn ng thu c chrn X gm hai kim loi v dung dch Y. Kt lun no sau y ng?

A. X gm Zn, Cu. B. Y gm FeSO4, CuSO4.C. Y gm ZnSO4, CuSO4. D. X gm Fe, Cu.

Cu 8:Ngm bt st vo dung dch gm Cu(NO3)2 v AgNO3. Kt thc phn ng thu c dung dch X gm hamui v cht rn Y gm hai kim loi. Kt lun no sau y ng?

A. X gm Fe(NO3)2, Cu(NO3)2. B. X gm Fe(NO3)2, Fe(NO3)3.C. Y gm Fe, Cu. D. Y gm Fe, Ag.

Cu 9: Cho hp kim Al, Mg, Ag vo dung dch CuCl2. Sau phn ng thu c hn hp 3 kim loi l

A. Cu, Al, Mg. B. Ag, Mg, Cu. C. Al, Cu, Ag. D. Al, Ag, Mg.

Cu 10: Cho hn hp bt Al, Fe vo dung dch cha Cu(NO3)2v AgNO3. Sau khi cc phn ng xy ra hoton, thu c hn hp rn gm ba kim loi l

A. Fe, Cu, Ag. B. Al, Cu, Ag. C. Al, Fe, Cu. D. Al, Fe, Ag.

Cu 11: Trong s cc kim loi Mg, Fe, Cu, kim loi c th y Fe ra khi dung dch Fe(NO3)3 l

A. Mg. B. Mg v Cu. C. Fe v Mg. D. Cu v Fe.Cu 12: Cho 5,5 gam hn hp bt Al v Fe (trong s mol Al gp i s mol Fe) vo 300 ml dung dch AgNO1M. Khuy k cho phn ng xy ra hon ton thu c m gam cht rn. Gi tr ca m l

A. 33,95 gam. B. 35,20 gam. C. 39,35 gam. D. 35,39 gam.Cu 13: Ngm mt vt bng Cu c khi lng 15 gam trong 340 gam dung dch AgNO3 6%. Sau mt thi gialy vt ra thy khi lng AgNO3 gim 25%. Khi lng ca vt sau phn ng l

A. 3,24 gam. B. 2,28 gam. C. 17,28 gam. D. 24,12 gam.Cu 14: Ho tan 5,4 gam bt Al vo 150 ml dung dch X cha Fe(NO3)3 1M v Cu(NO3)2 1M. Kt thc phn nthu c m gam rn. Gi tr ca m l

A. 10,95. B. 13,20. C. 13,80. D. 15,20.Cu 15: Cho hn hp kim loi Mg, Zn, Fe vo dung dch cha AgNO3 v Cu(NO3)2. Sau khi phn ng xy rhon ton thu c dung dch X gm 3 mui v cht rn Y gm 3 kim loi. Ba mui trong X l

A. Mg(NO3)2, Fe(NO3)3, AgNO3. B. Mg(NO3)2, Zn(NO3)2, Cu(NO3)2.C. Mg(NO3)2, Zn(NO3)2, Fe(NO3)3. D. Mg(NO3)2, Zn(NO3)2, Fe(NO3)2.Cu 16: Dy gm cc kim loi u tc dng c vi dung dch FeCl3 l

A. Fe, Mg, Cu, Ag, Al. B. Fe, Zn, Cu, Al, Mg.C. Cu, Ag, Au, Mg, Fe. D. Au, Cu, Al, Mg, Zn.

Cu 17: Cho x mol Mg vo dung dch cha y mol Cu(NO3)2 v z mol AgNO3, sau khi kt thc phn ng thc dung dch 2 mui. Mi quan h gia x, y, z l

A. 0,5z x < 0,5z + y. B. z a < y + z. C. 0,5z x 0,5z + y. D. x < 0,5z + y.Cu 18: Cho 300 ml dung dch AgNO3 vo 200 ml dung dch Fe(NO3)2 sau khi phn ng kt thc thu c 19,4gam cht rn v dung dch X trong s mol ca Fe(NO3)3 gp i s mol ca Fe(NO3)2 cn d. Dung dch X cth ho tan ti a bao nhiu gam hn hp bt kim loi gm Al v Mg (t l mol 1 : 3) l

A. 11,88 gam. B. 7,92 gam. C. 8,91 gam. D. 5,94 gam.Cu 19: Cho x mol Fe tc dng vi dung dch cha y mol AgNO3. dung dch sau phn ng tn ti cc ioFe3+, Fe2+ th gi tr ca a = y/x l

A. 3 < a < 3,5. B. 1 < a < 2. C. 0,5 < a < 1. D. 2 < a < 3.Cu 20: Cho hn hp bt gm 1,68 gam Fe v 0,36 gam Mg tc dng vi 375 ml dung dch CuSO 4 a mol/l khunh cho n khi dung dch mt mu xanh. Nhn thy khi lng kim loi thu c sau phn ng l 2,82 gam. Gitr ca a l

A. 0,10. B. 0,08. C. 0,25. D. 0,06.


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Cu 21: Nhng 1 l Mn vo dung dch Zn2+

thy mt lp km ph ngoi l Mn. Mt khc, ion Co2+

c th ox

ha Zn thnh Zn2+

v ion H+

c th oxi ha Co thnh Co2+

. Da vo kt qu thc nghim trn ngi ta xp ccp oxi ha kh theo chiu tng th in cc chun nh sau:

A. 2H+/H2, Co

2+/Co, Zn

2+/Zn, Mn

2+/Mn. B. 2H

+/H2, Co

2+/Co, Mn

2+/Mn, Zn

2+/Zn.

C. Zn2+

/Zn, Co2+

/Co, Mn2+

/Mn, 2H+/H2. D. Mn

2+/Mn, Zn

2+/Zn, Co

2+/Co, 2H

+/H2.

Cu 22: Cho cc cp oxi ho kh theo ng trt t ca dy in ho: Fe2+

/Fe, 2H+

/H2, Cu2+

/Cu. Fe3+

/Fe2

Ag+/Ag. Da trn dy in ho trn, c bao nhiu cht trong s cc cht phn ng c vi nhau trong s ccht sau: Cu, Fe, Ag v cc dung dch HCl, H2SO4, FeCl2, FeCl3?

A. 2. B. 3. C. 4. D. 5.

Cu 23: Nhng mt l Zn mng vo dung dch Ni2+

s c mt lp kim loi Ni mng ph trn b mt l Zn. Nhng Svo dung dch mui trn, khng c hin tng g xy ra. Cc cp oxi ho - kh ca cc kim loi trn xp theo th t tnoxi ho ca cation tng dn l

A. Ni2+

/Ni, Sn2+

/Sn, Zn2+

/Zn. B. Zn2+

/Zn, Ni2+

/Ni, Sn2+

/Sn.

C. Sn2+

/Ni, Ni2+

/Sn, Sn2+

/Zn. D. Zn2+

/Zn, Sn2+

/Sn, Ni2+

/Ni.Cu 24: Cho mt lng bt Zn vo dung dch X gm FeCl2 v CuCl2. Khi lng cht rn sau khi cc phn nxy ra hon ton nh hn khi lng Zn ban u l 0,5 gam. C cn phn dung dch sau phn ng thu c 13,gam mui khan. Tng khi lng cc mui trong X l

A. 13,1 gam. B. 19,5 gam. C. 14,1 gam. D. 17,0 gam.Cu 25: Nhng mt thanh km v mt thanh st vo cng mt dung dch CuSO 4. Sau mt thi gian ly 2 thankim loi ra thy trong dung dch cn li c nng mol ZnSO4 bng 2,5 ln nng mol ca FeSO4. Mt khckhi lng dung dch gim 2,2 gam. Khi lng ca ng bm ln thanh km v thanh st ln lt l

A. 12,8 gam; 32 gam. B. 64 gam; 25,6 gam. C. 32 gam; 12,8 gam. D. 25,6 gam; 64 gam.Cu 26: Nhng thanh km vo dung dch cha 8,32 gam CdSO4. Sau khi kh hon ton ion Cd

2+ khi lnthanh km tng 2,35% so vi ban u. Khi lng thanh km ban ul

A. 60 gam. B. 70 gam. C. 80 gam. D. 90 gam.Cu 27: Nhng thanh kim loi M ho tr II vo dung dch CuSO4, sau mt thi gian ly thanh kim loi ra thkhi lng gim 0,05%. Mt khc, nhng thanh kim loi trn vo dung dch Pb(NO 3)2, sau mt thi gian thkhi lng tng 7,1%. Bit rng s mol ca CuSO4 v Pb(NO3)2 tham gia 2 trng hp l nh nhau. Kim loM l

A. Mg. B. Al. C. Fe. D. Zn.Cu 28: Ho tan 3,28 gam hn hp mui CuCl2 v Cu(NO3)2 vo nc c dung dch X. Nhng Mg vo dundch X cho n khi mt mu xanh ca dung dch. Ly thanh Mg ra cn li thy tng thm 0,8 gam. C cn dundch sau phn ng thu c m gam mui khan. Gi tr ca m l

A. 1,28. B. 2,48. C. 4,13. D. 1,49.Cu 29: Cho hai thanh st c khi lng bng nhau.

- Thanh 1 nhng vo dung dch c cha a mol AgNO3.- Thanh 2 nhng vo dung dch c cha a mol Cu(NO3)2.Sau phn ng ly thanh st ra, sy kh v cn li, ta thyA. Khi lng hai thanh sau nhng vn bng nhau nhng khc ban u.B. Khi lng thanh 2 sau nhng nh hn khi lng thanh 1 sau nhng.C. Khi lng thanh 1 sau nhng nh hn khi lng thanh 2 sau nhng.D. Khi lng 2 thanh khng i vn nh trc khi nhng.

Cu 30: Nhng mt thanh kim loi Al v mt thanh Fe vo dung dch Cu(NO 3)2 sau mt thi gian ly 2 thankim loi ra thy khi lng dung dch cn li cha Al(NO3)3 v Fe(NO3)2 vi t l mol 3:2 v khi lng dundch gim 2,32 gam (cc phn ng xy ra hon ton). Khi lng Cu bm vo thanh Al v Fe l

A. 4,16 gam. B. 2,88 gam. C. 1,28 gam. D. 2,56 gam.Cu 31: Nhung m gam kim loi M ho tr II vo dung dch CuSO4 sau mt thi gian ly thanh kim loi ra thkhi lng gim 0,075%. Mt khc, khi nhng m gam thanh kim loi trn vo dung dch Pb(NO 3)2 sau mt th


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gian ly thanh kim loi ra thy khi lng thanh kim loi tng 10,65% (bit s mol ca CuSO 4 v Pb(NO3)2 thamgia 2 trng hp l nh nhau). Kim loi M l

A. Mg. B. Zn. C. Mn. D. Ag.Cu 32: Ngm mt l km vo dung dch cha 2,24 gam ion kim loi M2+ c trong thnh phn mui sunfat. Phng xong ly l km ra khi dung dch, ra nh, lm kh, khi lng l km tng thm 0,94 gam. Cng thc phnt mui sunfat l

A. CdSO4. B. CuSO4. C. FeSO4. D. NiSO4.Cu 33: Cho a gam hn hp bt cc kim loi Ni v Cu vo dung dch AgNO 3 d, khuy k cho n kh phn nkt thc thu c 54 gam kim loi. Mt khc, cng cho a gam hn hp bt kim loi trn vo dung dch CuSO 4 dkhuy k cho n khi phn ng kt thc thu c (a + 0,5) gam kim loi. Gi tr ca a l

A. 5,9. B. 15,5. C. 32,4. D. 9,6.Cu 34: Ngi ta ph mt lp bc trn mt vt bng ng c khi lng 8,48 gam bng cch ngm vt trondung dch AgNO3. Sau mt thi gian ly vt ra khi dung dch, ra nh, lm kh cn c 10 gam. Khlng ca Ag ph trn b mt ca vt l

A. 1,52 gam. B. 2,16 gam. C. 1,08 gam. D. 3,2 gam.Cu 35: Cho m gam hn hp bt Zn v Fe vo lng d CuSO4. Sau khi kt thc cc phn ng, lc b phn dundch thu c m gam bt rn. Thnh phn phn trm khi lng ca Zn trong hn hp ban u l

A. 90,27%. B. 85,30%. C. 82,20%. D. 12,67%.Cu 36: Ngm thanh Fe vo dung dch cha 0,03 mol Cu(NO3)2 mt thi gian, ly thanh kim loi ra thy trondung dch ch cn cha 0,01 mol Cu(NO3)2. Gi s kim loi sinh ra bm ht vo thanh Fe. Hi khi lng thanFe tng hay gim bao nhiu gam?

A. Tng 0,08 gam. B. Tng 0,16 gam. C. Gim 0,08 gam. D. Gim 0,16 gam.Cu 37: Ngm mt vt bng Cu c khi lng 10 gam trong 250 ml dung dch AgNO3 4%. Khi ly vt ra khdung dch th khi lng AgNO3 trong dung dch gim 17%. Khi lng ca vt sau phn ng l

A. 27 gam. B. 10,76 gam. C. 11,08 gam. D. 17 gam.Cu 38: C 2 l kim loi cng cht, cng khi lng, c kh nng to ra hp cht c s oxi ho l +2. Mt lc ngm trong dung dch Pb(NO3)2 v l kia c ngm trong dung dch Cu(NO3)2. Sau mt thi gian ta lcc kim loi ra khi dung dch, ra nh, lm kh. Nhn thy khi lng l kim loi ngm trong dung dch mu

ch tng 19%, cn l kim loi kia gim 9,6%. Bit rng trong 2 phn ng trn, khi lng cc kim loi b ho tannh nhau. L kim loi dng lA. Mg. B. Zn. C. Cd. D. Fe.

Cu 39: Ho tan 25 gam mui CuSO4.5H2O vo nc c 500 ml dung dch. Cho dn mt st vo 50 ml dundch trn, khuy nh cho n khi ht mu xanh. Khi lng cht rn thu c sau phn ng tng hay gim banhiu gam?

A.Tng 0,8 gam. B. Tng 0,08 gam. C. Gim 0,08 gam. D. Gim 0,8 gam.Cu 40: Cho mt l ng vo 20 ml dung dch AgNO3. Sau khi phn ng xy ra hon ton, ly l ng ra nhlm kh v cn th thy khi lng l ng tng thm 1,52 gam. Nng mol ca dung dch AgNO3 l

A. 1,5M. B. 0,9M. C. 1M. D. 2,6M.Cu 41: Ngm mt thanh st vo dung dch cha 1,6 gam mui sunfat ca kim loi trong nhm IIA. Sau ph

ng thanh st tng thm 0,08 gam. Cng thc phn t ca mui sunfat lA. PbSO4. B. CaSO4. C. CuSO4. D. FeSO4.Cu 42: Ngi ta ph mt lp bc trn vt bng ng c khi lng 8,48 gam bng cch ngm vt trondung dch AgNO3. Sau khi ngm mt thi gian, ngi ta ly vt ra khi dung dch, ra nh, lm kh, cn nn10 gam. Khi lng ca bc ph trn b mt ca vt l

A. 2,61 gam. B. 2,16 gam. C. 3,1 gam. D. 2,5 gam.Cu 43: Cht no sau y c th oxi ho Zn thnh Zn2+?

A. Fe. B. Al3+. C. Ag+. D. Mg2+.Cu 44: Nhng mt l Mg vo dung dch 2 mui FeCl3 v FeCl2. Sau mt thi gian ly l Mg ra lm kh ri cn li thkhi lng Mg gim so vi ban u. Dung dch sau phn ng c cation no sau y?

A. Mg2+. B. Mg2+ v Fe2+. C. Mg2+, Fe2+ v Fe3+. D. B hoc C.


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Cu 45: Cho 3 kim loi Al, Fe, Cu v 4 dung dch ZnSO4, AgNO3, CuCl2, MgSO4. Kim loi no tc dng vi c 4 dundch mui trn?

A. Al. B. Fe. C. Cu. D. Khng c kim loi no.Cu 46: Cho Cu d tc dng vi dung dch AgNO3 c dung dch X. Cho Fe d vo dung dch X c dung dch YDung dch Y cha:

A. Fe(NO3)2. B. Fe(NO3)3. C. Fe(NO3)2 v Cu(NO3)2. D. Fe(NO3)3 v Cu(NO3)2.

Cu 47: Hn hp X gm 3 kim loi: Fe, Ag, Cu. Cho X vo dung dch Y ch cha 1 cht tan, khuy k cho n khi phnng kt thc thy Fe v Cu tan ht v cn li Ag khng tan ng bng lng Ag vn c trong hn hp X. Cht tan trondung dch Y l

A. AgNO3. B. Cu(NO3)2. C. Fe2(SO4)3. D. FeSO4.Cu 48: Cho hn hp bt kim loi gm: Fe, Ag, Cu vo dung dch AgNO3 d. S phn ng oxi ho - kh xy ra l

A. 2. B. 3. C. 4. D. 5.Cu 49: Dung dch FeSO4 c ln tp cht l CuSO4, loi CuSO4 ra khi dung dch c th dng:

A. Fe. B. Cu. C. Al. D. A hoc C.Cu 50: Cho hn hp Cu d, Fe vo dung dch HNO3 long. Sau khi phn ng kt thc thu c dung dch X. Cht tatrong dung dch X l

A. Fe(NO3)3. B. Fe(NO3)2.

C. Fe(NO3)3 v Cu(NO3)2. D. Fe(NO3)2 v Cu(NO3)2.Cu 51: Ngm mt thanh Cu trong dung dch c cha 0,04 mol AgNO3, sau mt thi gian ly thanh kim loi ra thkhi lng tng hn s vi lc ban u l 2,28 gam. Coi ton b kim loi sinh ra bm ht vo thanh Cu. S mol AgNOcn li trong dung dch l

A. 0,01 mol. B. 0,02 mol. C. 0,015 mol. D. 0,005 mol.

Cu 52: Nhng thanh Zn vo dung dch cha hn hp 3,2 gam CuSO4 v 6,24 gam CdSO4. Hi sau khi Cu2+

v Cd2+

bkh hon ton th khi lng thanh Zn tng hay gim? Bao nhiu gam?

A. Tng 1,39 gam. B. Gim 1,39 gam. C. Tng 4 gam. D. Gim 4 gam.Cu 53: Cho 13 gam bt Zn vo dung dch cha 0,1 mol Fe(NO3)3, 0,1 mol Cu(NO3)2 v 0,1 mol AgNO3. Khuu cho phn ng xy ra hon ton. Khi lng kim loi thu c sau phn ng l


Cu 54: Cho m gam bt Fe vo 100 ml dung dch gm Cu(NO3)2 1M v AgNO3 4M. Sau khi kt thc phn nthu c dung dch 3 mui (trong c mt mui ca Fe) v 32,4 gam cht rn. Gi tr ca m l

A. 11,2. B. 16,8. C. 22,4. D. 5,6Cu 55: Cho 4 cp oxi ho - kh: Fe2+/Fe; Fe3+/Fe2+; Ag+/Ag; Cu2+/Cu. Dy cp xp theo chiu tng dn v tnoxi ho v gim dn v tnh kh l

A. Fe2+/Fe; Cu2+/Cu; Fe3+/Fe2+; Ag+/Ag. B. Cu2+/Cu; Fe2+/Fe;Fe3+/Fe2+; Ag+/Ag.C. Fe3+/Fe2+; Fe2+/Fe; Ag+/Ag; Cu2+/Cu. D. Ag+/Ag; Fe3+/Fe2+; Cu2+/Cu; Fe2+/Fe.

Cu 56: Cho dung dch Fe2(SO4)3 tc dng vi Cu c FeSO4 v CuSO4. Cho dung dch CuSO4 tc dng vkim loi Fe c FeSO4 v Cu. Qua cc phn ng xy ra ta thy tnh oxi ho ca cc ion kim loi gim dn thedy sau

A. Cu2+; Fe3+; Fe2+. B. Fe3+; Cu2+; Fe2+. C. Cu2+; Fe2+; Fe3+. D. Fe2+; Cu2+; Fe3+.

Cu 57: Cho 14 gam bt Fe vo 400 ml dung dch X gm AgNO3 0,5M v Cu(NO3)2 xM. Khuy nh cho ti khphn ng kt thc thu c dung dch Y v 30,4 gam cht rn Z. Gi tr ca x l

A. 0,15M. B. 0,125M. C. 0,2M. D. 0,1M.Cu 58: Cho hn hp gm 2,8 gam Fe v 0,81 gam Al vo 200 ml dung dch X cha AgNO 3 v Cu(NO3)2 khphn ng kt thc thu c dung dch Y v 8,12 gam cht rn Z gm 3 kim loi. Cho cht rn Z tc dng vdung dch HCl d c 0,672 lt kh H2 ( ktc). Nng mol ca dung dch AgNO3 v Cu(NO3)2 ln lt l

A. 0,1M v 0,2M. B. 0,15M v 0,25M. C. 0,28M v 0,15M. D. 0,25M v 0,1M.Cu 59: Mt thanh kim loi M ho tr II nhng vo 2 lt dung dch FeSO 4, sau phn ng khi lng thanh kimloi M tng 32 gam. Cng thanh kim loi y nhng vo 2 lt dung dch CuSO4, sau phn ng khi lng thanh M


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tng 40 gam (gi s ton b lng kim loi thot ra u bm ln thanh kim loi M v cc phn ng xy ra honton). Kim loi M dng v nng mol ca dung dch CuSO4 l

A. Zn v 0,4M. B. Cd v 0,6M. C. Mg v 0,5M. D. Ba v 0,7M.Cu 60: Ho tan mt hn hp bt kim loi c cha 5,6 gam Fe v 6,4 gam Cu vo 350 ml dung dch AgNO 3 2MSau khi cc phn ng xy ra hon ton, khi lng cht rn thu c l

A. 64,8 gam. B. 54 gam. C. 20,8 gam. D. 43,2 gam.

Cu 61: Cho a mol Mg v b mol Zn vo dung dch cha c mol Cu2+ v d mol Ag+. Bit rng a < c + d2

. Mi qua

h gia b v a, c, d c mt dung dch cha 3 ion kim loi l

A. b < c a. B. b > c a. C. b > c a +d

2. D. b < c a +

d

2.

Cu 62: Dy cc ion kim loi no sau y u b Zn kh thnh kim loi?A. Cu2+, Ag+, Na+. B. Pb2+, Ag+, Al3+. C. Sn2+, Pb2+, Cu2+. D. Cu2+, Mg2+, Pb2+.

P N: DY IN HO CA KIM LOI

1) C 2) D 3) B 4) D 5) A 6) B 7) D 8) A 9) C 10) A11) A 12) B 13) C 14) B 15) D 16) B 17) A 18) C 19) B 20) A

21) D 22) D 23) B 24) A 25) B 26) C 27) D 28) B 29) B 30)

31) 32) A 33) B 34) B 35) A 36) B 37) B 38) C 39) A 40) C

41) C 42) B 43) C 44) D 45) D 46) A 47) C 48) B 49) A 50) D

51) A 52) A 53) D 54) A 55) A 56) B 57) B 58) B 59) C 60) B

61) D 62) C

III) PIN IN HO V N MN IN HO

Cu 1: Trong cu mui ca pin in ho Zn Cu c s di chuyn caA. cc ion. B. cc electron. C. cc nguyn t Cu. D. cc nguyn t Zn.

Cu 2: Trong pin in ho, s oxi hoA. ch xy ra cc m. B. ch xy ra cc dng.C. xy ra cc m v cc dng. D. khng xy ra cc m v cc dng.

Cu 3: Cp cht no sau y tham gia phn ng trong pin in ho ZnCu?

A. Zn2+ + Cu. B. Zn2+ + Cu2+. C. Cu2+ + Zn. D. Cu + Zn.Cu 4: Trong qu trnh pin in ho ZnAg hot ng ta nhn thy

A. khi lng ca in cc Zn tng.B. khi lng ca in cc Ag gim.C. nng ca ion Zn2+ trong dung dch tng.D. nng ca ion Ag+ trong dung dch tng.

Cu 5: Trong pin in ho, s oxi ho xy ra:A. ch anot. B. ch catot.C. c anot v catot. D. khng anot, khng catot.

Cu 6: Nhn nh no sau y khng ng?


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A. Cht oxi ho v cht kh ca cng mt nguyn t kim loi to nn cp oxi ho - kh.B. Khi pin in ho (Zn Cu) hot ng xy ra phn ng gia cp oxi ho - kh Zn 2+/Zn v Cu2+/Cu lm cho nn Cu2+ trong dung dch gim dn, nng Zn2+ tng dn.C. Sut in ng chun ca pin in ho ph thuc vo: bn cht cp oxi ho kh, nng cc dung dch mui vnhit .D. Trong pin in ho phn ng oxi ho - kh xy ra nh dng in mt chiu.

Cu 7: Phn ng ho hc xy ra trong pin in ho Zn Cu:Cu2+ + Zn Zn2+ + Cu

Trong pin :A. Cu2+ b oxi ho. B. Cu l cc m. C. Zn l cc dng. D. Zn l cc m.

Cu 8: Bit th in cc chun ca cc cp oxi ho - kh: Mg2+/Mg, Zn2+/Zn, Sn2+/Sn, Fe2+/Fe, Cu2+/Cu ln lt l2,37V; -0.76V; -0,14V; -0,44V; -0,34V. Qu trnh Sn Sn2+ +2e xy ra khi ghp in cc Sn vi in cc no say?

A. Mg. B. Zn. C. Fe. D. Cu.Cu 9: Khi pin in ho Zn Pb phng in, ion Pb2+ di chuyn v

A. cc dng v b oxi ho. B. cc dng v b kh.C. cc m v b kh. D. cc m v b oxi ho.

Cu 10: Cho th in cc chun ca cc cp oxi ho - kh 2H+/H2, Zn2+/Zn, Cu2+/Cu, Ag+/Ag ln lt l 0,00V; -0.76V+0,34V; +0,8V.

Sut in ng ca pin in ho no sau y ln nht?A. 2Ag + 2H+ 2Ag+ + H2. B. Zn + 2H

+ Zn2+ + H2.C. Zn + Cu2+ Zn2+ + Cu. D. Cu + 2Ag+ Cu2+ + 2Ag.

Cu 11:Nhn nh no sau y khng ng?A. Dy in ho chun ca kim loi l dy cc cp oxi ho - kh ca cc cp kim loi sp xp theo chiu th in ccchun n

oM /ME + tng dn.

B. Gi tr th in cc chun no

M /ME + cng ln th tnh oxi ho ca cation Mn+ cng mnh v tnh kh ca kim lo

M cng yu v ngc li.

C. Chiu phn ng gia 2 cp oxi ho - kh l cation kim loi trong cp oxi ho - kh c th in cc ln hn c thoxi ho c kim loi trong cp c th in cc nh hn.D. Gi tr th in cc chun ca pin in ho lun l s dng.

Cu 12: So snh pin in ho v n mn in ho, iu no sau y khng ng?A. Cht c tnh kh mnh hn b n mn.B. Kim loi c tnh kh mnh hn lun l cc m.C. Tn cc in cc ging nhau: catot l cc m, anot l cc dng.D. Pin in ho pht sinh dng in, n mn in ho khng pht sinh dng in.

Cu 13: Cho phn ng xy ra trong pin in ho: Fe + 2Ag+ Fe2+ + 2Ag.Bit o 2Fe /FeE + = -0,44V v

oAg /AgE + = +0,80V. Sut in ng chun ca pin in ho ny l

A. 2,04V. B. 1,24V. C. 0,36V. D. 0,72V.Cu 14: Trong cc trng hp sau trng hp no khng xy ra n mn in ho?A. Nhng thanh Cu trong dung dch Fe2(SO4)3 c nh mt vi git dung dch H2SO4.B. S n mn v tu trong nc bin.C. Nhng thanh Zn trong dung dch H2SO4 c nh vi git CuSO4.D. S g ca gang thp trong t nhin.

Cu 15: Mt dy phi qun o gm mt on dy ng ni vi mt on dy thp. Hin tng no sau y xyra ti ch ni hai on dy khi lu ngy?

A. St b n mn. B. ng b n mn.C. St v ng u b n mn. D. St v ng u khng b n mn.

Cu 16: Pht biu no sau y l khng ng?


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A. n mn kim loi l s hu hoi kim loi v hp kim di tc dng ca mi trng xung quanh.B. n mn kim loi l mt qu trnh ho hc trong kim loi b n mn bi cc axit trong mi trng khngkh.C. Trong qu trnh n mn, kim loi b oxi ho thnh ion ca n.D. n mn kim loi c chia lm hai dng: n mn ho hc v n mn in ho hc.

Cu 17: Loi phn ng ho hc xy ra trong n mn kim loi l

A. Phn ng th. B. Phn ng phn hu.C. Phn ng oxi ho - kh. D. Phn ng ho hp.

Cu 18: Kim loi no sau y c kh nng t to ra mng oxit bo v khi ngoi khng kh m?A. Zn. B. Fe. C. Ca. D. Na.

Cu 19: Cho th in cc chun ca 3 cp oxi ho - kh l Ni2+/Ni, Cu2+/Cu, Ag+/Ag ln lt l -0,23V, +0,34V+0,80V. Kt lun ng l

A. Sut in ng chun ca pin Cu - Ag bng 0,46V.B. Sut in ng chun ca pin Ni - Cu bng 0,11V.C. Sut in ng chun ca pin Cu - Ag bng 1,14V.D. Sut in ng chun ca pin Ni - Ag bng 0,57V.

Cu 20: Trong pin in ho Cu-Ag ti in cc ng xy ra qu trnh:

A. oxi ho H2O. B. kh Cu2+. C. kh H2O. D. oxi ho Cu.Cu 21: Phn ng ho hc xy ra trong pin in ho:

2Cr + 3Cu2+ 2Cr3+ + 3CuEo ca pin in ho l (bit o 2Cu /CuE + = +0,34V;

o3Cr /Cr

E+

= 0,74V)

A. 0,40V. B. 1,08V. C. 1,25V. D. 2,5V.Cu 22: Phn ng ho hc xy ra trong pin in ho:

2Au3+ + 3Ni 2Au + 3Ni2+Eo ca pin in ho lA. 3,75V. B. 2,25V. C. 1,76V. D. 1,25V.

Cu 23: Trong qu trnh pin in ho Zn Ag hot ng, ta nhn thyA. khi lng ca in cc Zn tng.B. khi lng ca in cc Ag gim.C. nng ca ion Zn2+ trong dung dch tng.D. nng ca ion Ag+ trong dung dch tng.

Cu 24: Trong pin in ho Zn Cu, phn ng ho hc no xy ra in cc m?A. Zn2+ + 2e Zn. B. Cu Cu2+ + 2e.C. Cu2+ + 2e Cu. D. Zn Zn2+ + 2e.

Cu 25: Trong n mn in ho hc, xy raA. s oxi ho cc dng. B. s kh cc m.C. s oxi ho cc dng v s kh cc m. D. s oxi ho cc m v s kh cc dng.

Cu 26: Trong cc trng hp sau, trng hp kim loi b n mn in ho hc lA. Kim loi Zn trong dung dch HCl. B. Thp cacbon trong khng kh m.C. t dy Fe trong kh O2. D. Kim loi Cu trong dung dch HNO3 long.

Cu 27: Cho cc cp kim loi nguyn cht tip xc trc tip vi nhau: Fe v Pb; Fe v Zn; Fe v Sn; Fe v NKhi nhng cc cp kim loi trn vo dung dch axit s cp kim loi trong st b ph hu trc l

A. 1. B. 2. C. 3. D. 4.Cu 28: Khi lu ngy trong khng kh m mt vt bng st ty (st trng thic) b sy st su ti lp st btrong s xy ra qu trnh:

A. Sn b n mn in ho. B. Fe b n mn in ho.C. Fe b n mn ho hc. D. Sn b n mn ho hc.

Cu 29: bo v v tu bin lm bng thp ngi ta thng gn vo v tu (phn ngm di nc) nhng tmkim loi no sau y?


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A. Sn. B. Pb. C. Zn. D. Cu.Cu 30: Ngi ta d nh dng mt s phng php chng n mn kim loi sau:

1. Cch li kim loi vi mi trng xung quanh.2. Dng hp kim chng g.3. Dng cht km hm.4. Ngm kim loi trong nc.

5. Dng phng php in ho.Phng php ng lA. 1, 2, 4, 5. B. 1, 2, 3, 4. C. 2, 3, 4, 5. D. 1, 2, 3, 5.

Cu 31: S ph hu kim loi hoc hp kim do tc dng ca cc cht trong mi trng gi lA. s n mn ho hc. B. s n mn in ho. C. s n mn kim loi. D. s kh kim loi.

Cu 32: Pht biu no sau y l ng khi ni v n mn ho hc?A. n mn ho hc lm pht sinh dng in mt chiu.B. Kim loi tinh khit s khng b n mn ho hc.C. V bn cht, n mn ho hc cng l mt dng n mn in ho.D. n mn ho hc khng lm pht sinh dng in.

Cu 33: bo v tu bin lm bng thp (phn chm di nc bin), ng dn nc, dn du, dn kh t ngm

di t,... ngi ta gn vo mt ngoi ca thp nhng tm Zn. Ngi ta bo v thp khi s n mn bncch no?

A. Cch li kim loi vi mi trng. B. Dng phng php in ho.C. Dng Zn l cht chng n mn. D. Dng Zn l kim loi khng g.

Cu 34: Cun mt si dy thp vo mt thanh kim loi ri nhng vo dung dch H 2SO4 long. Quan st thy bkh thot rt ra nhanh t si dy thp. Thanh kim loi dng c th l

A. Cu. B. Ni. C. Zn. D. Pt.Cu 35: Ngm mt l km vo dung dch HCl thy bt kh thot t v chm. Nu nh thm vi git dung dch Xth thy bt kh thot ra rt nhiu v nhanh. Cht tan trong dung dch X l

A. H2SO4. B. FeSO4. C. NaOH. D. MgSO4.Cu 36: Cm 2 l kim loi Zn v Cu ni vi nhau bi mt si dy dn vo cc thu tinh. Rt dung dch H 2SO

long vo cc thu tinh thy kh H2 thot ra t l Cu. Gii thch no sau y khng ng vi th nghim trn?A. Cu tc dng vi H2SO4 sinh ra H2.B. cc dng xy ra phn ng kh: 2 H+ + 2e H2.C. cc m xy ra phn ng oxi ho: Zn 2Zn + + 2e.D. Zn b n mn in ho v sinh ra dng in.

Cu 37: iu kin xy ra n mn in ho lA. cc in cc phi khc nhau, c th l 2 cp kim loi - kim loi; cp kim loi - phi kim hoc kim loi - hcht ho hc.B. cc iu kin phi tip xc trc tip hoc gin tip vi nhau qua dy dn.C. cc in cc cng tip xc vi dung dch cht in li.D. c 3 iu kin trn.

Cu 38: Mt si dy phi qun o bng Cu ni vi mt on dy Al trong khng kh. Hin tng v kt lunno sau y ng?

A. Ch ni 2 kim loi Cu-Al trong t nhin xy ra n mn ho hc.B. Al l in cc m b n mn nhanh.C. Khng nn ni bng nhng kim loi khc nhau, nn ni bng on dy Cu.D. C A, B, C u ng.

Cu 39: C nhng vy bng st c m bng nhng kim loi khc nhau di y. Nu cc vt ny u b sst su n lp st, th vt no b g st chm nht?

A. st trng km. B. st trng thic. C. st trng niken. D. st trng ng.


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Cu 40: Trn cc ca p nc bng thp thng thy c gn nhng l Zn mng. Lm nh vy l chng nmn cc ca p theo phng php no trong cc phng php sau y?

A. Dng hp kim chng g. B. Phng php ph.C. Phng php bin i ho hc lp b mt. D. Phng php in ho.

Cu 41: Cho mt thanh Al tip xc vi mt thanh Zn trong dung dch HCl, s xy ra hin tng:A. Thanh Al tan, bt kh H2 thot ra t thanh Zn.

B. Thanh Zn tan, bt kh H2 thot ra t thanh Al.C. C 2 thanh cng tan, bt kh thot ra t c 2 thanh.D. Thanh Al tan trc, bt kh thot ra t thanh Al.

Cu 42: Mt si dy Cu ni vi mt si dy Fe ngoi khng kh m, sau mt thi gian c hin tngA. dy Fe v dy Cu b t. B. ch ni dy Fe b mn v t.C. ch ni dy Cu b mn v t. D. Khng c hin tng g.

Cu 43: Trong qu trnh hot ng ca pin in ho Cu Ag, nng ca cc ion trong dung dch bin i nhth no?

A. Nng ca ion Ag+ tng dn v nng ca ion Cu2+ tng dn.B. Nng ca ion Ag+ gim dn v nng ca ion Cu2+ gim dn.C. Nng ca ion Ag+ gim dn v nng ca ion Cu2+ tng dn.

D. Nng ca ion Ag+ tng dn v nng ca ion Cu2+ gim dn.Cu 44: Bit:

opin( Ni Ag)E = 1,06V v

o2Ni /Ni

E+

= 0,26V, th in cc chun ca cp oxi ho - kh Ag+/Ag l

A. 0,8V. B. 1,32V. C. 0,76V. D. 0,85V.Cu 45: Cho bit oAg /AgE + = +0,80V v

o2Hg /Hg

E+

= +0,85V. Phn ng ho hc no sau y xy ra c?

A. Hg + Ag+ Hg2+ + Ag. B. Hg2+ + Ag Hg + Ag+.C. Hg2+ + Ag+ Hg + Ag. D. Hg + Ag Ag+ + Hg2+.

Cu 46: Sut in ng chun ca pin in ho CdMn l +0,79V v th in cc chun ca cp 2o

Cd /CdE

+ = 0,40V

Th in cc chun ca cp 2o

Mn /MnE

+ l

A. 0,39V. B. +0,39V. C. 1,19V. D. +1,19V.Cu 47: ng kim loi thay th ion bc trong dung dch, kt qu c c l s to thnh bc kim loi v ion ng. iny ch ra rng:

A. Phn ng trao i xy ra.B. Bc t tan hn ng.C. Cp oxi ho kh Ag+/Ag c th in cc chun cao hn Cu2+/Cu.D. Kim loi Cu d b kh.

Cu 48: Nhng qu trnh oxi ho v kh xy ra trn b mt cc in cc ca pin in ho ZnCu c vit bng phngtrnh ion rt gn l

A. Cu2+

+ ZnCu + Zn2+

. B. CuCu2+

+ 2e.

C. Zn2+

+ Cu Zn + Cu2+

. D. Zn2+

+ 2e Zn.

Cu 49: C nhng pin in ho c ghp bi cc cp oxi ho - kh chun sau:(1) Ni2+/Ni v Zn2+/Zn; (2) Cu2+/Cu v Hg2+/Hg; (3) Mg2+/Mg v/Pb2+/Pbin cc dng ca cc pin in ho lA. Pb, Zn, Hg. B. Ni, Hg, Pb. C. Ni, Cu, Hg. D. Mg, Zn, Hg.

Cu 50: Sut in ng chun ca pin in ho CrNi l +0,51V v th in cc chun ca cp 2o

Ni /NiE

+ =

0,23V. Th in cc chun ca cp 3o

Cr /Cr E

+ l

A. 0,24V. B. 0,74V. C. +0,74V. D. +0,73V.Cu 51: Cho cc trng hp sau, trng hp kim loi b n mn in ho l

A. Thp c cha cacbon trong khng kh m.


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B. t dy st trong kh oxi.C. Cho kim loi Cu vo dung dch HNO3 long.D. Cho kim loi Zn vo dung dch HCl.

Cu 52: Ngm mt l Zn vo dung dch HCl thy bt kh thot ra t v chm. Nu nh thm vo vi git dungdch X th thy bt kh thot ra rt nhiu v nhanh. Cht tan trong dung dch X l

A. H2SO4. B. FeSO4. C. NaOH. D. MgSO4.

Cu 53:

P N: PIN IN HO V N MN IN HO

1) A 2) A 3) C 4) C 5) A 6) D 7) D 8) D 9) B 10) C

11) D 12) D 13) B 14) 15) A 16) 17) C 18) A 19) A 20) D

21) B 22) C 23) C 24) D 25) D 26) B 27) C 28) B 29) C 30) D

31) C 32) D 33) B 34) C 35) B 36) A 37) D 38) D 39) A 40) D

41) A 42) B 43) C 44) B 45) B 46) C 47) C 48) A 49) B 50) B51) A

IV) S IN PHN

Cu 1: Trong cc qu trnh in phn cc anion di chuyn vA. catot, y chng b oxi ho. B. cc dng v b kh.C. anot, y chng b oxi ho. D. catot v y chng b kh.

Cu 2: Trong qu trnh in phn dung dch Pb(NO3)2 vi in cc tr, ion Pb2+ di chuyn vA. cc dng v b oxi ho. B. cc dng v b kh.C. cc m v b oxi ho. D. cc m v b kh.

Cu 3: Trong qu trnh in phn dung dch CuCl2 bng in cc tr thA. ion Cu2+ nhng electron anot. B. ion Cu2+ nhn electron catot.C. ion Clnhn electron anot. D. ion Clnhng electron catot.

Cu 4: in phnNaCl nng chy bng in cc tr, catot thu cA. Cl2. B. Na. C. NaOH. D. H2.

Cu 5: Trong qu trnh in phn dung dch CuSO4 bng in cc tr graphit, phn ng no sau y xy ra anot?

A. ion Cu2+ b kh. B. ion Cu2+ b oxi ho.

C. phn t nc b oxi ho. D. phn t nc b kh.Cu 6: Trong qu trnh in phn dung dch NaCl bng in cc tr c mng ngn

A. cation Na+ b kh catot. B. phn t H2O b kh catot.C. ion Clb kh anot. D. phn t H2O b oxi ho anot.

Cu 7: in phn dung dch X cha hn hp cc mui sau: CaCl2, FeCl3, ZnCl2, CuCl2. Ion u tin b kh catot l

A. Cl. B. Fe3+. C. Zn2+. D. Cu2+.Cu 8: in phn dung dch X cha hn hp cc mui sau: CaCl2, FeCl3, ZnCl2, CuCl2. Kim loi thot ra tin catot l

A. Ca. B. Fe. C. Zn. D. Cu.


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Cu 9: Khi in phn mt mui, nhn thy pH khu vc gn mt in cc tng ln. Dung dch mui lA. CuSO4. B. KCl. C. ZnCl2. D. AgNO3.

Cu 10: in phn 200 ml dung dch M(NO3)n bng in cc tr n khi catot bt u c kh thot ra th ngnin phn. trung ho dung dch sau in phn, phi dng 250 ml dung dch NaOH 0,8M. Mt khc, nu ngmmt thanh Zn c khi lng 50 gam vo 200 ml dung dch M(NO3)n khi phn ng xong thy khi lng thanh Ztng thm 30,2% so vi ban u. Cng thc ca M(NO3)n l

A. Pb(NO3)2. B. AgNO3. C. Cd(NO3)2. D. KNO3.Cu 11: Sau mt thi gian in phn 200 ml dung dch CuSO4 (D = 1,25 g/ml) bng in cc tr graphit thkhi lng dung dch gim 8 gam. lm kt ta ht ion Cu2+ cn li trong dung dch sau in phn cn dn100 ml dung dch H2S 0,5M. Nng mol v nng phn trm ca CuSO4 trc in phn l

A. 2,75M v 32,5%. B. 0,75M v 9,6%. C. 0,75M v 9,0%. D. 0,75M v 32,5%.Cu 12: in phn dung dch AgNO3 vi cng dng in l 1,5A, thi gian 30 pht, khi lng bc thc l

A. 6,0 gam. B. 3,20 gam. C. 1,5 gam. D. 0,05 gam.Cu 13: in phn bng in cc tr dung dch mui sunfat ca kim loi ho tr II vi dng in c cng 6ASau 29 pht in phn thy khi lng catot tng 3,45 gam. Kim loi l

A. Zn. B. Cu. C. Ni. D. Sn.

Cu 14: in phn 200 ml dung dch KOH 2M (D = 1,1 g/cm3) vi in cc tr. Khi catot thot ra 2,24 lt kh(ktc) th ngng in phn. Bit rng nc bay hi khng ng k. Dung dch sau in phn c nng phntrm l

A. 10,27%. B. 10,18%. C. 10,9%. D. 38,09%.Cu 15: in phn 400 ml dung dch CuSO4 0,2M vi cng dng in 10A trong mt thi gian thu 0,224 lt kh (ktc) anot. Bit in cc dng l in cc tr v hiu sut in phn l 100%. Khi lng catotng l

A. 1,28 gam. B. 0,32 gam. C. 0,64 gam. D. 3,2 gam.Cu 16: Tin hnh in phn 200 ml dung dch CuSO4 vi in cc tr n khi khi lng gim 8 gam th dnli. Dn kh H2S d vo dung dch sau in phn thy c 4,8 gam kt ta. Nng mol/l ca dung dch CuSOban u l

A. 0,875M. B. 0,65M. C. 0,75M. D. 0,55M.Cu 17: in phn 100 ml dung dch CuSO4 0,2M v AgNO3 0,1M vi I = 3,86A. Thi gian in phn 1,72 gam kim loi bm trn catot l

A. 250s. B. 500s. C. 750s. D. 1000s.Cu 18: Trong 4 dung dch mui: CuSO4, K2SO4, NaCl, KNO3. Dung dch sau khi in phn (in cc tr) to rmt dung dch axit l

A. NaCl. B. CuSO4. C. K2SO4. D. KNO3.Cu 19: in phn 100 ml dung dch hn hp H2SO4 0,5M v NaCl 0,5M vi in cc tr, mng ngn xp khi catot thot ra 1,12 lt kh (ktc) th dng li. Th tch kh (ktc) thot ra anot l

A. 1,12 lt. B. 0,56 lt. C. 0,784 lt. D. 0,84 lt.Cu 20: Dung dch X cha HCl, CuSO4, Fe2(SO4)3. Ly 400 ml dung dch X em in phn vi in cc tr, I

7,724A cho n khi catot thu c 5,12 gam Cu th dng li. Khi anot c 0,1 mol mt cht kh bay raThi gian in phn v nng [Fe2+] ln lt lA. 2300s v 0,15M. B. 2300s v 0,10M. C. 2500s v 0,10M. D. 2500s v 0,15M.

Cu 21: in phn dung dch cha HCl, CuCl2, NaCl in cc tr, n khi ht c 3 cht. Kt lun no sau khng ng?

A. Gian on in phn HCl th pH dung dch gim.B. Kt thc in phn, pH dung dch tng so vi ban u.C. Th t in phn: CuCl2, HCl, dung dch NaCl.D. Giai on in phn NaCl th pH dung dch tng.


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Cu 22: in phn nng chy Al2O3vi anot than ch (hiu sut in phn 100%) thu c m gam Al catot v67,2 lt ( ktc) hn hp kh X c t khi so vi oxi bng 1. Ly 1,12 lt ( ktc) hn hp kh X sc vo dung dchnc vi trong (d) thu c 1 gam kt ta. Gi tr ca m l

A. 75,6. B. 67,5. C. 108,0. D. 54,0.Cu 23: Trong qu trnh in phn dung dch AgNO3 (in cc tr), cc dng (anot) xy ra qu trnh no say?

A. Ag+ + 1e Ag. B. 2H2O + 4e H2 + 2OH.C. Ag Ag+ + 1e. D. 2H2O 4H

+ + O2 + 4e.Cu 24: in phn dung dch NaOH vi cng khng i l 10A trong thi gian 268 gi. Dung dch cn lsau in phn c khi lng 100 gam v nng 24%. Nng % ca dung dch ban u l

A. 4,8%. B. 2,4%. C. 9,6%. D. 1,2%.Cu 25: Dung dch X c cha KCl, FeCl3, HCl. in phn dung dch X mt thi gian thu c dung dch Y. Ykhng lm i mu qu tm chng t qu trnh in phn dng li khi

A. va ht FeCl3. B. va ht FeCl2. C. va ht HCl. D. in phn ht KCl.Cu 26: in phn dung dch X cha 0,3 mol AgNO3 v 0,1 mol Cu(NO3)2 vi anot bng Cu trong thi gia11580 giy, cng dng in I = 5A. Khi lng kim loi to ra catot l

A. 58 gam. B. 38,8 gam. C. 48,4 gam. D. 42 gam.

Cu 27: in phn hon ton dung dch mui MSO4 bng in cc tr c 0,448 lt kh ( ktc) anot v 2,3gam kim loi M catot. Kim loi M l

A. Cd. B. Ni. C. Mg. D. Cu.Cu 28: Sau mt thi gian in phn 200 ml dung dch CuCl2 thu c 1,12 lt kh X ( ktc). Ngm inh st vdung dch sau in phn, sau khi phn ng xy ra hon ton thy khi lng inh st tng thm 1,2 gam. Nng mol CuCl2 ban u l

A.1M. B. 1,5M. C. 1,2M. D. 2M.Cu 29: in phn 200 ml dung dch cha 2 mui Cu(NO3)2 xM v AgNO3 yM vi cng dng in 0,804Athi gian in phn l 2 gi, ngi ta thy khi lng catot tng thm 3,44 gam. Gi tr ca x v y l

A. x = y = 0,1. B. x = y = 0,02. C. x = 0,02; y = 0,01. D. x = y = 0,05.Cu 30: in phn in cc tr dung dch mui clorua ca mt kim loi ho tr II vi cng dng in l

3,0A. Sau 1930 giy thy khi lng catot tng 1,92 gam. Kim loi trong mui dng lA. Cu. B. Zn. C. Ba. D. Fe.Cu 31: in phn 500 ml dung dch AgNO3 vi in cc tr cho ti khi catot bt u c kh thot ra th ngng trung ho dung dch in phn cn 800 ml dung dch NaOH 1M. Bit cng dng in dng l 20Athi gian in phn l

A. 4013 giy. B. 3728 giy. C. 3918 giy. D. 3860 giy.Cu 32: in phn 400 ml dung dch gm: AgNO3 0,2M v Cu(NO3)2 0,1M vi cng dng in I = 10Aanot tr. Sau mt thi gian t ngt dng in sy kh catot ri cn li thy khi lng catot nng thm m gamtrong c 1,28 gam Cu. Gi tr ca m v t l

A. 1,28 gam v 1930s. B. 9,92 gam v 1158s.C. 2,28 gam v 965s. D. 4,58 gam v 1250s.

Cu 33: in phn dung dch AgNO3 trong thi gian 16,08 pht vi cng dng in l 5A, c V lt khanot. kt ta ht ion Ag+ cn li trong dung dch sau in phn cn dng 25 ml dung dch NaCl 0,4M. Khlng AgNO3 c trong dung dch ban u v gi tr ca V l

A. 10,08 gam v 0,56 lt. B. 8,5 gam v 0,28 lt.C. 10,2 gam v 0,28 lt. D. 8,5 gam v 1,12 lt.

Cu 34: in phn dung dch c ho tan 13,5 gam CuCl2 v 14,9 gam KCl (c mng ngn v in cc tr) tronthi gian 2 gi vi cng dng in l 5,1A. Dung dch sau in phn c trung ho va bi V lt dundch HCl 1M. Gi tr ca V l

A. 0,18. B. 0,7. C. 0,9. D. 0,5.Cu 35: Khi in phn dung dch mui trong nc, tr s pH khu vc gn mt in cc tng ln. Dung dcmui em in phn l


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A. CuSO4. B. AgNO3. C. K2SO4. D. KCl.Cu 36: in phn (bng in cc tr, c mng ngn) dung dch cha 0,02 mol FeSO4 v 0,06 mol HCl vi dnin 1,34 trong 2 gi. Gi s hiu sut t 100%. Khi lng kim loi v tng th tch kh ( ktc) sinh ra ti cin c l

A. 5,6 gam v 4,48 lt. B. 1,12 gam v 1,568 lt.C. 11,2 gam v 0,896 lt. D. 0,56 gam v 0,448 lt.

Cu 37: Khi in phn dung dch hn hp gm KCl, FeCl3 v CuCl2 th th t b kh catot lA. Fe3+, Cu2+, Fe2+, H2O. B. Fe

3+, Cu2+, H2O.C. Cu2+, Fe3+, Fe2+, H2O. D. Fe

3+, Cu2+, Fe2+, K+.Cu 38: Mc ni tip 2 bnh in phn AgNO3 v Cu(NO3)2. Sau mt thi gian th thu c 1,08 gam Ag tcatot ca bnh in phn. Khi lng Cu trn catot ca bnh in phn cn li l


Cu 39: in phn vi in cc tr dung dch cha 0,3 mol AgNO3 vi cng dng in 2,68 A, trong thgian t (gi) thu c dung dch X (hiu sut qu trnh in phn l 100%). Cho 22,4 gam bt Fe vo X thy thora kh NO (sn phm kh duy nht) v sau cc phn ng hon ton thu c 34,28 gam cht rn. Gi tr ca t l

A. 0,60. B. 1,00. C. 0,25. D. 1,20.Cu 40: in phn 500 ml dung dch AgNO3 vi in cc tr cho n khi catot bt u c kh thot ra th ngn

in phn. trung ho dung dch sau in phn cn 800 ml dung dch NaOH 1M. Bit cng dng in dngin phn l 20A. Thi gian in phn l

A. 3918 giy. B. 3860 giy. C. 4013 giy. D. 3728 giy.Cu 41: in phn mt dung dch c ho tan 13,5 gam CuCl2 v 14,9 gam KCl (c mng ngn v in cc trtrong thi gian 2 gi vi cng dng in l 5,1A. Dung dch sau in phn c trung ho va bi V ldung dch HCl 1M. Gi tr ca V l

A. 0,18. B. 0,5. C. 0,7. D. 0,9.Cu 42: in phn 200 ml dung dch CuSO4 vi cc in cc tr dng in mt chiu I = 9,65A. Khi th tcthot ra 2 in cc u bng 1,12 lt (ktc) th ngng in phn. Khi lng kim loi sinh ra catot l m gamv thi gian in phn l t giy. Gi tr ca m v t ln lt l

A. 3,2; 1000. B.

P N: S IN PHN

1) C 2) A 3) B 4) B 5) C 6) B 7) B 8) D 9) B 10) B

11) B 12) B 13) B 14) A 15) A 16) C 17) C 18) B 19) D 20) C

21) A 22) A 23) D 24) B 25) B 26) D 27) B 28) A 29) A 30) A

31) D 32) B 33) C 34) A 35) D 36) B 37) A 38) B 39) 40) B

41) D 42) 43) 44) 45) 46) 47) 48) 49) 50)

V) IU CH KIM LOI

Cu 1: Nguyn tc chung iu ch kim loi l


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A. thc hin s kh cc kim loi. B. thc hin s kh cc ion kim loi.C. thc s oxi ho cc kim loi. D. thc hin s oxi ho cc ion kim loi.

Cu 2: Phn ng iu ch kim loi no di y khng thuc phng php nhit luyn?A. 3CO + Fe2O3 2Fe + 3CO2. B. Zn + CuSO4 ZnSO4 + Cu.C. 2Al + Cr2O3 2Cr + Al2O3. D. HgS + O2 Hg + SO2.

Cu 3: in phn nng chy mt mui ca kim loi M vi cng dng in l 10A, thi gian in phn l 8

pht 25 giy, thu c 0,25 mol kim loi M catot. S oxi ho ca kim loi M trong mui lA. +1. B. +2. C. +3. D. +4.

Cu 4: T mi cht Cu(OH)2, NaCl, FeS2 la chn phng php thch hp (cc iu kin khc c ) iu chra cc kim loi tng ng. Khi s phn ng ti thiu phi thc hin iu ch 3 kim loi Cu, Na, Fe l

A. 3. B. 4. C. 5. D. 6.Cu 5: Khi iu ch kim loi, cc ion kim loi ng vai tr l cht

A. kh. B. nhn proton. C. b kh. D. cho proton.Cu 6: in phn dung dch cha cc dung dch mui sau: NaCl, CuCl2, FeCl3, ZnCl2. Kim loi cui cng thora catot trc khi c kh thot ra l

A. Zn. B. Na. C. Fe. D. Cu.Cu 7: Dy gm cc kim loi c iu ch trong cng nghip bng phng php in phn hp cht nng ch

ca chng lA. Na, Ca, Al. B. Fe, Ca, Al. C. Na, Ca, Zn. D. Na, Cu, Al.

Cu 8: kh hon ton 30 gam hn hp gm CuO, FeO, Fe3O4, Fe2O3, Fe, MgO cn dng 5,6 lt CO (ktcKhi lng cht rn thu c sau phn ng l

A. 28 gam. B. 24 gam. C. 26 gam. D. 22 gam.Cu 9: Phn ng no di y vit sai?

A. 2Na[Ag(CN)2] + Zn 2ZnO + 2SO2. B. 2ZnS + 3O2ot

2ZnO + 2SO2.

C. 2HgS + 3O2ot 2HgO + 2SO2. D. Ag2S + 4NaCN 2Na[Ag(CN)2] + Na2S.

Cu 10: Cho kh CO d i qua ng s nung nng ng hn hp X gm: Al2O3, MgO, Fe3O4, CuO thu c chrn Y. Cho Y vo dung dch NaOH d, khuy k, thy cn li phn khng tan Z. Gi s cc phn ng xy ra hon

ton. Phn khng tan Z gmA. MgO, Fe, Cu. B. Mg, Fe, Cu. C. MgO, Fe3O4, Cu. D. Mg, FeO, Cu.Cu 11: Cho lung kh H2 (d) qua hn hp cc oxit sau: CuO, Fe2O3, ZnO, MgO nung nhit cao. Sau phng hon ton hn hp cht rn thu c gm

A. Cu, Fe, ZnO, MgO. B. Cu, Fe, Zn, MgO. C. Cu, Fe, Zn, Mg. D. Cu, FeO, ZnO, MgO.Cu 12: in phn n ht 0,1 mol Cu(NO3)2 trong dung dch vi in cc tr, th sau in phn khi lndung dch gim bao nhiu gam?

A. 1,6 gam. B. 18,8 gam. C. 6,4 gam. D. 8,0 gam.Cu 13: Nhn nh no di y khng ng v bn cht qu trnh ho hc in cc trong qu trnh in phn

A. S oxi ho xy ra catot. B. Cation nhn electron catot.C. Anion nhng electron anot. D. S kh xy ra catot.

Cu 14: in phn nng chy mui clorua ca kim loi M. Sau in phn catot thu c 6 gam kim loi v anot thu c 3,36 lt kh (ktc) thot ra. Mui clorua lA. BaCl2. B. CaCl2. C. NaCl. D. KCl.

Cu 15: Cho dng in 3A i qua mt dung dch ng (II) nitrat trong 1 gi th lng ng kt ta trn catot lA. 7,12 gam. B. 31,8 gam. C. 3,58 gam. D. 18,2 gam.

Cu 16: Kh hon ton 4,06 gam oxit kim loi bng CO nhit thnh kim loi. Dn ton b sn phm khsinh ra vo dung dch Ca(OH)2 d thy to thnh 7 gam kt ta. Nu ly lng kim loi sinh ra ho tan ht vdung dch HCl th thu c 1,176 lt H2 (ktc). Cng thc ca oxit kim loi l

A. CuO. B. Al2O3. C. Fe3O4. D. ZnO.


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Cu 17: Thi mt lung kh CO (d) i qua ng s ng m gam hn hp gm Fe3O4 v CuO nung nng phn ng hon ton thu c 2,32 gam hn hp kim loi. Kh thot ra c hp th ht vo bnh ng dung dcCa(OH)2 d thu c 5 gam kt ta. Gi tr ca m l

A. 3,21. B. 3,32. C. 3,22. D. 3,12.Cu 18: Mt hn hp X gm: Fe, FeO v Fe2O3. Cho 4,72 gam hn hp ny tc dng vi CO d nhit caoKhi phn ng xong thu c 3,92 gam Fe. Nu ngm cng mt lng hn hp trn vo dung dch CuSO 4 d

phn ng xong thu c 4,96 gam cht rn. Khi lng Fe, FeO v Fe2O3 trong X lA. 1,2 gam; 1,19 gam v 2,01 gam. B. 1,8 gam; 1,42 gam v 1,5 gam.C. 1,68 gam; 1,44 gam v 2,07 gam. D. 1,68 gam; 1,44 gam v 1,6 gam.

Cu 19: Phn ng ho hc no sau y ch thc hin c bng phng php in phn?A. CuSO4 + H2O Cu + O2 + H2SO4. B. CuSO4 + NaOH Cu(OH)2 + Na2SO4.C. Fe + CuSO4 FeSO4 + Cu. D. Cu + AgNO3 Ag + Cu(NO3)2.

Cu 20: Dung dch FeSO4 c ln tp cht CuSO4. Phng php ho hc n gin loi c tp cht lA. Chuyn hai mui thnh hiroxit, oxit kim loi ri ho tan bng H2SO4 long.B. Cho st Fe vo dung dch, sau khi phn ng xong lc b cht rn.C. in phn dung dch vi in cc tr n khi ht mu xanh.D. Cho Mg vo dung dch cho n khi ht mu xanh.

Cu 21: C 4 dung dch mui: AgNO3, KNO3, CuCl2, ZnCl2. Khi in phn (vi in cc tr) dung dch muno cho ta c kh thot ra c c anot v catot?

A. AgNO3. B. KNO3. C. CuCl2. D. AgNO3.Cu 22: kh hon ton 23,2 gam mt oxit kim loi, cn dng 8,96 lt H2 (ktc). Kim loi l

A. Mg. B. Fe. C. Cr. D. Cu.Cu 23: Ho tan hon ton 28 gam Fe vo dung dch AgNO3 d th khi lng cht rn thu c l

A. 108 gam. B. 162 gam. C. 216 gam. D. 154 gam.

P N: IU CH KIM LOI

1) B 2) B 3) B 4) C 5) C 6) A 7) A 8) C 9) C 10) A

11) A 12) D 13) A 14) B 15) C 16) C 17) D 18) D 19) A 20) B

21) B 22) 23) B 24) 25) 26) 27) 28) 29) 30)

I CNG V KIM LOITRONG CC THI H, C T NM 2007 N NAY

Cu 1(H khi A - 2007): Dy cc ion xp theo chiu gim dn tnh oxi ho l (bit trong dy in ho, cp Fe3+/Fe2ng trc cp Ag+/Ag):

A. Ag+, Cu2+, Fe3+, Fe2+. B. Fe3+, Cu2+, Ag+, Fe2+.C. Ag+, Fe3+, Cu2+, Fe2+. D. Fe3+, Ag+, Cu2+, Fe2+.

Cu 2 (H khi A - 2007): in phn dung dch CuCl2 vi in cc tr, sau mt thi gian thu c 0,32 gam C catt v mt lng kh X ant. Hp th hon ton kh X trn vo 200 ml dung dch NaOH ( nhit thngSau phn ng, nng NaOH cn li l 0,05M (gi thit th tch dung dch khng thay i. Nng ban u cdung dch NaOH l

A. 0,15M. B. 0,2M. C. 0,1M. D. 0,05M.


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Cu 3 (H khi A - 2007): Dy gm cc kim loi c iu ch trong cng nghip bng phng php in phn hcht nng chy ca chng, l:

A. Na, Ca, Al. B. Na, Ca, Zn. C. Na, Cu, Al. D. Fe, Ca, Al.Cu 4 (H khi A - 2007): Mnh khng ng l:

A. Fe2+ oxi ho c Cu.B. Fe kh c Cu2+ trong dung dch.

C. Fe3+ c tnh oxi ho mnh hn Cu2+.D. Tnh oxi ho ca cc ion tng theo th t: Fe2+, H+, Cu2+, Ag+.

Cu 5 (C - 2007): kh ion Fe3+ trong dung dch thnh ion Fe2+ c th dng mt lng dA. kim loi Mg. B. kim loi Cu. C. kim loi Ba. D. kim loi Ag.

Cu 6 (C - 2007): Cho cc cp kim loi nguyn cht tip xc trc tip vi nhau: Fe v Pb; Fe v Zn; Fe v Sn; Fe vNi. Khi nhng cc cp kim loi trn vo dung dch axit s cp kim loi trong Fe b ph hu trc l

A. 4. B. 1. C. 2. D. 3.Cu 7 (C - 2007): Th t mt s cp oxi ho - kh trong dy in ho nh sau:

Fe2+/Fe, Cu2+/Cu, Fe3+/Fe2+.Cp cht khng phn ng vi nhau lA. Fe v dung dch CuCl2. B. Fe v dung dch FeCl3.

C. dung dch FeCl2 v dung dch CuCl2. D. Cu v dung dch FeCl3.Cu 8 (C - 2007): Phn ng ho hc xy ra trong trng hp no di y khng thuc loi phn ng nhinhm?

A. Al tc dng vi Fe3O4 nung nng. B. Al tc dng vi CuO nung nng.C. Al tc dng vi Fe2O3 nung nng. D. Al tc dng vi axit H2SO4 c, nng.

Cu 9 (C - 2007): Cho cc ion kim loi: Zn2+, Sn2+, Ni2+, Fe2+, Pb2+. Th t tnh oxi ho gim dn lA. Pb2+ > Sn2+ > Fe2+ > Ni2+ > Zn2+. B. Sn2+ > Ni2+ > Zn2+ > Pb2+ > Fe2+.B. Zn2+ > Sn2+ > Ni2+ > Fe2+ > Pb2+. D. Pb2+ > Sn2+ > Ni2+ > Fe2+ > Zn2+.

Cu 10 (H khi B - 2007): Cho cc phn ng xy ra sau y:(1) AgNO3 + Fe(NO3)2 Fe(NO3)3 + Ag(2) Mn + 2HCl MnCl2 + H2

Dy cc ion c xp theo chiu tng dn tnh oxi ho lA. Mn2+, H+, Fe3+, Ag+. B. Ag+, Fe3+, H+, Mn2+.C. Ag+, Mn2+, H+, Mn2+. D. Mn2+, H+, Ag+, Fe3+.

Cu 11 (H khi B - 2007): in phn dung dch cha a mol CuSO4 v b mol NaCl (bng in cc tr, c mnngn xp). dung dch sau khi in phn lm phenolphtalein chuyn sang mu hng th iu kin ca a v b l(bit ion 24SO

khng b in phn trong dung dch)

A. b < 2a. B. 2b = a. C. b = 2a. D. b > 2a.Cu 12 (H khi B - 2007): Trong pin in ho Zn-Cu, qu trnh kh trong pin l

A. Zn2+ + 2e Zn. B. Cu Cu2+ + 2e.C. Cu2+ + 2e Cu. D. Zn Zn2+ + 2e.

Cu 13 (H khi A - 2008): Khi in phn NaCl nng chy (in cc tr), ti catt xy ra

A. s kh ion Cl. B. s oxi ho ion Cl. C. s kh ion Na+. D. s oxi ho ion Na+.Cu 14 (H khi A - 2008): X l kim loi phn ng c vi dung dch H2SO4 long, Y l kim loi tc dnc vi dung dch Fe(NO3)3. Hai kim loi X, Y ln lt l (bit th t trong dy th in ho: Fe

3+/Fe2+ ntrc Ag+/Ag)

A. Fe, Cu. B. Cu, Fe. C. Ag, Mg. D. Mg, Ag.Cu 15 (H khi A - 2008): Cho hn hp bt gm 2,7 gam Al v 5,6 gam Fe vo 550 ml dung dch AgNO3 1MSau khi cc phn ng xy ra hon ton, thu c m gam cht rn. Gi tr ca m l (bit th t trong dy th iho: Fe3+/Fe2+ ng trc Ag+/Ag)

A. 59,4. B. 64,8. C. 32,4. D. 54,0.


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Cu 16 (H khi A - 2008): Bit rng ion Pb2+ trong dung dch oxi ha c Sn. Khi nhng hai thanh kim loi Pv Sn c ni vi nhau bng dy dn in vo mt dung dch cht in li th

A. c Pb v Sn u b n mn in ho. B. c Pb v Sn u khng b n mn in ho.C. ch c Pb b n mn in ho. D. ch c Sn b n mn in ho.

Cu 17 (H khi A - 2008): Mt pin in ho c in cc Zn nhng trong dung dch ZnSO4 v in cc Cnhng trong dung dch CuSO4. Sau mt thi gian pin phng in th khi lng

A. c hai in cc Zn v Cu u tng.B. in cc Zn gim cn khi lng in cc Cu tng.C. in cc Zn tng cn khi lng in cc Cu gim.D. c hai in cc Zn v Cu u gim.

Cu 18 (C - 2008): Cho phn ng ha hc: Fe + CuSO4 FeSO4 + Cu.Trong phn ng trn xy raA. s kh Fe2+ v s oxi ha Cu. B. s kh Fe2+ v s kh Cu2+.C. s oxi ha Fe v s oxi ha Cu. D. s oxi ha Fe v s kh Cu2+.

Cu 19 (C - 2008): Cho hn hp bt Al, Fe vo dung dch cha Cu(NO3)2 v AgNO3. Sau khi cc phn ng xra hon ton, thu c hn hp rn gm ba kim loi l:

A. Fe, Cu, Ag. B. Al, Cu, Ag. C. Al, Fe, Cu. D. Al, Fe, Ag.

Cu 20 (C - 2008): Cp cht khng xy ra phn ng ho hc lA. Cu + dung dch FeCl3. B. Fe + dung dch HCl.C. Fe + dung dch FeCl3. D. Cu + dung dch FeCl2.

Cu 21 (C - 2008): Hai kim loi c th c iu ch bng phng php in phn dung dch lA. Al v Mg. B. Na v Fe. C. Cu v Ag. D. Mg v Zn.

Cu 22 (C - 2008): Hai kim loi X, Y v cc dung dch mui clorua ca chng c cc phn ng ha hc sau:X + 2YCl3 XCl2 + 2YCl2;Y + XCl2 YCl2 + X.

Pht biu ng l:A. ion Y2+ c tnh oxi ha mnh hn ion X2+.B. kim loi X kh c ion Y2+.

C. kim loi X c tnh kh mnh hn kim loi Y.D. ion Y3+ c tnh kh mnh hn ion X2+.Cu 23 (C - 2008): Cho bit phn ng oxi ho - kh xy ra trong pin in ho Fe - Cu l:

Fe + Cu2+ Fe2+ + Cu; E0(Fe2+/Fe) = 0,44V, E0(Cu2+/Cu) = +0,34V.Sut in ng chun ca pin in ho Fe - Cu lA. 1,66 V. B. 0,10 V. C. 0,78 V. D. 0,92 V.

Cu 24 (H khi B - 2008): Tin hnh bn th nghim sau:- Th nghim 1: Nhng thanh Fe vo dung dch FeCl3;- Th nghim 2: Nhng thanh Fe vo dung dch CuSO4;- Th nghim 3: Nhng thanh Cu vo dung dch FeCl3;- Th nghim 4: Cho thanh Fe tip xc vi thanh Cu ri nhng vo dung dch HCl.

S trng hp xut hin n mn in ho lA. 1. B. 2. C. 4. D. 3.Cu 25 (H khi B - 2008): Cho sut in ng chun Eo ca cc pin in ho: Eo(Cu-X) = 0,46V; Eo(Y-Cu) 1,1V; Eo(Z-Cu) = 0,47V (X, Y, Z l ba kim loi). Dy cc kim loi xp theo chiu tng dn tnh kh t tri sangphi l

A. Z, Y, Cu, X. B. X, Cu, Z, Y. C. Y, Z, Cu, X. D. X, Cu, Y, Z.Cu 26 (H khi A - 2009): Dy cc kim loi u c th c iu ch bng phng php in phn dung dchmui ca chng l:

A. Fe, Cu, Ag. B. Mg, Zn, Cu. C. Al, Fe, Cr. D. Ba, Ag, Au.Cu 27 (H khi A - 2009): Cho bn hn hp, mi hn hp gm hai cht rn c s mol bng nhau: Na2O v Al2O3; Cv FeCl3; BaCl2 v CuSO4; Ba v NaHCO3. S hn hp c th tan hon ton trong nc (d) ch to ra dung dch l


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A. 3. B. 2. C. 1. D. 4.Cu 28 (H khi A - 2009): Cho cc hp kim sau: Cu-Fe (I); Zn-Fe (II); Fe-C (III); Sn-Fe (IV). Khi tip xc vi dundch cht in li th cc hp kim m trong Fe u b n mn trc l:

A. I, II v IV. B. I, II v III. C. I, III v IV. D. II, III v IV.Cu 29 (H khi A - 2009): Cho hn hp gm Fe v Zn vo dung dch AgNO3 n khi cc phn ng xy ra hoton, thu c dung dch X gm hai mui v cht rn Y gm hai kim loi. Hai mui trong X l

A. Fe(NO3)3 v Zn(NO3)2. B. Zn(NO3)2 v Fe(NO3)2.C. AgNO3 v Zn(NO3)2. D. Fe(NO3)2 v AgNO3.

Cu 30 (H khi A - 2009): Cho sut in ng chun ca cc pin in ho: Zn-Cu l 1,1V; Cu-Ag l 0,46VBit th in cc chun oAg /AgE + = +0,8V. Th in cc chun

o2Zn /Zn

E+

v o 2Cu /CuE + c gi tr ln lt l

A. -0,76V v +0,34V. B. -1,46V v -0,34V. C. +1,56V v +0,64V. D. -1,56V v +0,64V.Cu 31 (C - 2009): Dy no sau y ch gm cc cht va tc dng c vi dung dch HCl, va tc dng vi dung dch AgNO3?

A. Fe, Ni, Sn. B. Al, Fe, CuO. C. Zn, Cu, Mg. D. Hg, Na, Ca.Cu 32 (C - 2009):Nguyn tc chung c dng iu ch kim loi l

A. cho hp cht cha ion kim loi tc dng vi cht kh.

B. oxi ho ion kim loi trong hp cht thnh nguyn t kim loi.C. kh ion kim loi trong hp cht thnh nguyn t kim loi.D. cho hp cht cha ion kim loi tc dng vi cht oxi ho.

Cu 33 (C - 2009):Nhng mt l kim loi M (ch c ho tr hai trong hp cht) c khi lng 50 gam vo 20ml dung dch AgNO3 1M cho n khi phn ng xy ra hon ton. Lc dung dch, em c cn thu c 18,8 gammui khan. Kim loi M l

A. Fe. B. Cu. C. Mg. D. Zn.Cu 34 (C - 2009): Th t mt s cp oxi ho - kh trong dy in ho nh sau: Mg2+/Mg; Fe2+/Fe; Cu2+/CuFe3+/Fe2+; Ag+/Ag. Dy ch gm cc cht, ion tc dng c vi ion Fe3+ trong dung dch l:

A. Fe, Cu, Ag+. B. Mg, Fe2+, Ag. C. Mg, Cu, Cu2+. D. Mg, Fe, Cu.Cu 35 (C - 2009): Cho 100 ml dung dch FeCl2 1,2M tc dng vi 200 ml dung dch AgNO3 2M, thu c m gam

kt ta. Gi tr ca m lA. 34,44. B. 47,4. C. 30,18. D. 12,96.Cu 36 (H khi B - 2009): in phn c mng ngn 500 ml dung dch cha hn hp gm CuCl2 0,1M v NaCl 0,5M(in cc tr, hiu sut in phn 100%) vi cng dng in 5A trong 3860 giy. Dung dch thu c sau in phc kh nng ho tan m gam Al. Gi tr ln nht ca m l

A. 4,05. B. 2,70. C. 1,35. D. 5,40.Cu 37 (H khi B - 2009): Cho 2,24 gam bt st vo 200 ml dung dch cha hn hp gm AgNO3 0,1M vCu(NO3)2 0,5M. Sau khi cc phn ng xy ra hon ton, thu c dung dch X v m gam cht rn Y. Gi tr cm l

A. 2,80. B. 2,16. C. 4,08. D. 0,64.Cu 38 (H khi B - 2009): Nhng mt thanh st nng 100 gam vo 100 ml dung dch hn hp gm Cu(NO3)0,2M v AgNO

30,2M. Sau mt thi gian ly thanh kim loi ra, ra sch lm kh cn c 101,72 gam (gi thi

cc kim loi to thnh u bm ht vo thanh st). Khi lng st phn ng lA. 1,40 gam. B. 2,16 gam. C. 0,84 gam. D. 1,72 gam.

Cu 39 (H khi B - 2009): Cho cc th in cc chun: o 3Al /AlE + = 1,66V;o

2Zn /ZnE

+= 0,76V; o 2Pb /PbE + =

0,13V; o 2Cu /CuE + = +0,34V. Trong cc pin sau y, pin no c sut in ng chun ln nht?

A. Pin Zn Cu. B. Pin Zn Pb. C. Pin Al Zn. D. Pin Pb Cu.Cu 40 (H khi A - 2010): in phn (vi in cc tr) mt dung dch gm NaCl v CuSO 4 c cng s mon khi catot xut hin bt kh th dng in phn. Trong c qu trnh in phn trn, sn phm thu c anol

A. kh Cl2 v H2. B. kh Cl2 v O2. C. ch c kh Cl2. D. kh H2 v O2.


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Cu 41 (H khi A - 2010): Phn ng in phn dung dch CuCl2 (vi in cc tr) v phn ng n mn in hoxy ra khi nhng hp kim Zn-Cu vo dung dch HCl c c im l:

A. Phn ng cc m c s tham gia ca kim loi hoc ion kim loi.B. Phn ng cc dng u l s oxi ho Cl.C. u sinh ra Cu cc m.D. Phn ng xy ra lun km theo s pht sinh dng in.

Cu 42 (H khi A - 2010): in phn (in cc tr) dung dch X cha 0,2 mol CuSO4 v 0,12 mol NaCl bndng in c cng 2A. Th tch kh (ktc) thot ra anot sau 9650 giy in phn l

A. 1,344 lt. B. 2,240 lt. C. 1,792 lt. D. 2,912 lt.Cu 43 (C - 2010): Cho bit th t t tri sang phi ca cc cp oxi ho - kh trong dy in ho (dy th incc chun) nh sau: Zn2+/Zn; Fe2+/Fe; Cu2+/Cu; Fe3+/Fe2+; Ag+/Ag.

Cc kim loi v ion u phn ng c vi ion Fe2+ trong dung dch l:A. Zn, Ag+. B. Ag, Cu2+. C. Ag, Fe3+. D. Zn, Cu2+.

Cu 44 (C - 2010): Kim loi M c th c iu ch bng cch kh ion ca n trong oxit bi kh H2 nhit cao. Mt khc, kim loi M kh c ion H+ trong dung dch axit long thnh H2. Kim loi M l

A. Cu. B. Mg. C. Fe. D. Al.Cu 45 (C - 2010): Cho bit: o 2

Mg /Mg

E+

= 2,37V; o 2Zn /Zn

E+

= 0,76V; o 2Pb /Pb

E+

= 0,73V; o 2Cu /Cu

E+

+0,34V.Pin in ho c sut in ng chun bng 1,61V c cu to bi hai cp oxi ho - khA. Zn2+/Zn v Pb2+/Pb. B. Zn2+/Zn v Cu2+/Cu.C. Pb2+/Pb v Cu2+/Cu. D. Mg2+/Mg v Zn2+/Zn.

Cu 46 (C - 2010): in phn dung dch CuSO4 vi anot bng ng (anot tan) v in phn dung dch CuSOvi anot bng graphit (in cc tr) u c c im chung l

A. catot xy ra s kh: Cu2+ + 2e Cu.B. catot xy ra s oxi ho: 2H2O + 2e 2OH

+ H2.C. anot xy ra s kh: 2H2O O2 + 4H

+ + 4e.D. anot xy ra s oxi ho: Cu Cu2+ + 2e.

Cu 47 (H khi B - 2010): in phn (vi in cc tr) 200 ml dung dch CuSO4 nng x mol/l, sau mt thgian thu c dung dch Y vn cn mu xanh, c khi lng gim 8 gam so vi dung dch ban u. Cho 16,8 gambt st vo Y, sau khi cc phn ng xy ra hon ton, thu c 12,4 gam kim loi. Gi tr ca x l

A. 2,25. B. 1,50. C. 1,25. D. 3,25.Cu 48 (H khi B - 2010): C 4 dung dch ring bit: CuSO4, ZnCl2, FeCl3, AgNO3. Nhng vo mi dung dcmt thanh Ni. S trng hp xut hin n mn in ho l

A. 1. B. 4. C. 3. D. 2.Cu 49 (H khi B - 2010): Cho cc cp cht vi t l s mol tng ng nh sau:

(a) Fe3O4 v Cu (1:1); (b) Sn v Zn (2:1); (c) Zn v Cu (1:1);(d) Fe2(SO4)3 v Cu (1:1); (e) FeCl2 v Cu (2:1); (g) FeCl3 v Cu (1:1).S cp cht tan hon ton trong mt lng d dung dch HCl long nng l

A. 4. B. 2. C. 3. D. 5.Cu 50 (H khi A - 2011): in phn dung dch gm 7,45 gam KCl v 28,2 gam Cu(NO 3)2 (in cc tr, mnngn xp) n khi khi lng dung dch gim i 10,75 gam th ngng in phn (gi thit lng nc bay hkhng ng k). Tt c cc cht tan trong dung dch sau in phn l

A. KNO3, HNO3 v Cu(NO3)2. B. KNO3, KCl v KOH.C. KNO3v Cu(NO3)2. D. KNO3 v KOH.

Cu 51 (H khi A - 2011): Ho tan 13,68 gam mui MSO4 vo nc c dung dch X. in phn X (vi icc tr, cng dng in khng i) trong thi gian t giy, c y gam kim loi M duy nht catot v0,035 mol kh anot. Cn nu thi gian in phn l 2t giy th tng s mol kh thu c c hai in cc l0,1245 mol. Gi tr ca y l

A. 4,788. B. 4,480. C. 1,680. D. 3,920.


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Cu 52 (H khi A - 2011): Khi in phn dung dch NaCl (cc m bng st, cc dng bng than ch, c mnngn xp) th

A. cc m xy ra qu trnh oxi ho H2O v cc dng xy ra qu trnh kh ion Cl.

B. cc dng xy ra qu trnh oxi ho ion Na+ v cc m xy ra qu trnh kh ion Cl.C. cc m xy ra qu trnh kh H2O v cc dng xy ra qu trnh oxi ho ion Cl

.D. cc m xy ra qu trnh kh ion Na+ v cc dng xy ra qu trnh oxi ho ion Cl.

Cu 53 (H khi A - 2011): Cho cc phn ng sau:Fe + 2Fe(NO3)3 3 Fe(NO3)2AgNO3 + Fe(NO3)2 Fe(NO3)3 + AgDy sp xp theo th t tng dn tnh oxi ho ca cc ion kim loi l:A. Fe2+, Ag+, Fe3+. B. Ag+, Fe2+, Fe3+. C. Fe2+, Fe3+, Ag+. D. Ag+, Fe3+, Fe2+.

Cu 54 (C - 2011): in phn 500 ml dung dch CuSO4 0,2M (in cc tr) cho n khi catot thu c 3,gam kim loi th th tch kh (ktc) thu c anot l

A. 2,24 lt. B. 3,36 lt. C. 0,56 lt. D. 1,12 lt.Cu 55 (C - 2011): Nu vt lm bng hp kim Fe-Zn b n mn in ho th trong qu trnh n mn

A. km ng vai tr catot v b oxi ho. B. st ng vai tr anot v b oxi ho.C. st ng vai tr catot v ion H+ b oxi ho. D. km ng vai tr anot v b oxi ho.

Cu 56 (C - 2011): Dy gm cc ion u oxi ha c kim loi Fe lA. Fe3+, Cu2+, Ag+. B. Zn2+, Cu2+, Ag+. C. Cr2+, Au3+, Fe3+. D. Cr2+, Cu2+, Ag+.

Cu 57 (H khi B - 2011): Trong qu trnh hot ng ca pin in ho Zn Cu thA. nng ca ion Zn2+ trong dung dch tng. B. khi lng ca in cc Cu gim.C. nng ca ion Cu2+ trong dung dch tng. D. khi lng ca in cc Zn tng.

P N: I CNG V KIM LOI TRONG CC THI H, C

1) C 2) C 3) A 4) A 5) B 6) D 7) C 8) D 9) D 10) B

11) D 12) C 13) C 14) A 15) A 16) D 17) B 18) D 19) A 20) D

21) C 22) C 23) C 24) B 25) B 26) A 27) C 28) C 29) B 30) A

31) A 32) C 33) C 34) D 35) B 36) B 37) C 38) A 39) A 40) B

41) A 42) C 43) A 44) C 45) D 46) A 47) C 48) D 49) C 50) A

51) B 52) C 53) C 54) C 55) D 56) A 57) A

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