CC NI DUNG N TP V KIM LOI

A- I CNG V KIM LOI

- V tr, cu hnh e lp ngoi cng, mt s kiu mng tinh th kim loi ph bin, lin kt kim loi.- Mt s tnh cht vt l ca kim loi:

+ TC vt l chung: tnh do, dn in, dn nhit, c nh kim (nguyn nhn gy ra)

+ Mt s tnh cht vt l khc

- Tnh cht ha hc chung ca kim loi: TNH KH

+ Tc dng vi phi kim+ Tc dng vi axit.

- Kim loi ng trc H trong dy hot ng hh tc dng vi H2SO4 long v HCl to thnh mui v gii phng kh H2.

- Hu ht kim loi (tr Au, Pt) tc dng vi axit HNO3, H2SO4 c to mui ca kim loi c ha tr cao nht + sp kh + H2O

- Mt s KL th ng trong HNO3 c ngui v H2SO4 c, ngui: Al, Fe, Cr

- Kim loi tc dng vi nc.

+ k thng: KL nhm IA, IIA tc dng vi H2O tr Be khng p, Mg p chm

+ to cao: Mg, Fe, Zn... p vi H2O

* Dy in ha kim loi, ng dng

* Nguyn tc v cc phng php iu ch kim loi.

- KL nhm IA: pnc mui halogenua hoc hidroxit.

- KL nhm IIA: pnc mui halogenua.

- Kl nhm: pnc Al2O3

-Kl sau nhm: pdd mui ca n, hay kh oxit ca chng hoc dng KL mnh hn tc dng vi mui ca chng.

* n mn kim loi: khi nim n mn kim loi. Phn bit n mn ha hc, n mn in ha hc. Cc phng php chng n mn kim loi

B- KIM LOI KIM, KIM LOI KIM TH V HP CHT

1. n cht

- V tr, cu hnh electron nguyn t

- Tnh cht vt l

- Tnh cht ha hc chung: tnh kh mnh

+ Tc dng vi phi kim

+ Tc dng vi axit

+ Tc dng vi H2O

- Phng php iu ch: pnc

2. Hp cht

Tnh cht v ng dng ca mt s hp cht quan trng ca canxi

3. Nc cng

Khi nim, thnh phn ha hc, phn loi tnh cng (tm thi, vnh cu, ton phn). Tc hi ca nc cng. Cc phng php lm mm nc cng.

4. Phng php nhn bit ion Ca2+, Mg2+C- NHM V HP CHT CA NHM

1. n cht

- V tr, Che nguyn t

- Tnh cht vt l

- Tnh cht ha hc: tnh kh mnh

+ Tc dng vi phi kim

+ Tc dng vi dung dch axit

+ Tc dng vi dung dch kim

+ Kh oxit kim loi nhit cao

+ Tc dng vi dung dch mui

- Phng php iu ch: pnc Al2O3 (nm c vai tr ca criolit trong qu trnh sn xut nhm, cc qu trnh in cc xy ra khi pnc)

2. Hp cht

- Tnh cht v ng dng ca Al2O3, Al(OH)3, mui nhm sunfat

D- ST, NG, CROM V MT S KIM LOI QUAN TRNG

1. St v hp cht ca st

- V tr, Che nguyn t

- Tnh cht vt l, tnh cht ha hc ca st:

Tnh kh trung bnh

- TPHH ca gang, thp. Phn loi gang, thp. Nguyn tc, nguyn liu v cc qu trnh sn xut gang, thp

- Tnh cht v ng dng ca mt s hp cht st (II), st (III)

2. Crom v hp cht ca crom

- V tr, Che nguyn t. Cc trng thi oxh thng gp

- Tnh cht vt l, tnh cht ha hc ca crom:

Tnh kh trung bnh (mnh hn Fe)

- Tnh cht v ng dng ca mt s hp cht Crom (III), crom (VI)

3. Mt s kim loi quan trng khc

V tr, tnh cht v ng dng ca mt s kim loi: Cu, Ni, Zn, Pb, SnH thng k nng cn t:

- So snh bn cht ca lin kt kim loi vi lin kt ion v lin kt CHT.

- Vit cu hnh electron.

- Vit phng trnh HH.

- Lm bi tp kim loi tc dng vi phi kim.

- Bi tp kim loi tc dng vi axit.

- Bi tp xc nh tn kim loi.

- Bi tp dy in ha kim loi.

- Bi tp v nhit luyn, thy luyn, in phn (lu vi bi tp in phn p dng cng thc Faraday).

- Cu hi v bi tp v n mn v chng n mn kim loi.

- Xc nh Che chung ca kim loi kim, kim th- Vit PTHH

- Xc nh cc thnh phn ha hc ca cc loi nc cng

- Gii mt s bi tp:

+ KLK, KLKT tc dng vi H2O

+ KLK, KLKT tc dng vi dung dch axit

+ pnc hp cht ca KLK, KLKT

+ CO2 tc dng vi dung dch kim

+ Mui cacbonat tc dng vi dung dch axit

- Vit Che nguyn t, xc nh v tr ca nhm trong bng tun hon

- Vit PTHH

- Gii mt s bi tp v nhm v hp cht:

+ Bi tp nhm tc dng vi phi kim

+ Tc dng vi dung dch axit

+ Tc dng vi dung dch kim

+ Kh oxit kim loi nhit cao

+ Tc dng vi dung dch mui

+ Bi tp iu ch nhm

+ Bi tp v tnh cht lng tnh ca Al2O3, Al(OH)3- Vit cu hnh electron, xc nh v tr ca kim loi

- Vit PTHH

- Gii mt s bi tp:

+ Kim loi tc dng vi phi kim

+ Kim loi tc dng vi dung dch axit

+ Kim loi tc dng vi dung dch mui

+ Xc nh tn kim loi

+ Kh oxit kim loi nhit cao

+ Mt s bi tp v phn ng ca cc hp cht ca Fe, Cr

BI TP

CU HI V BI TP NI DUNG I CNG KIM LOI

1. Dy cc ion c sp xp theo chiu tng dn tnh oxi ho l

A. Mn2+, H+, Fe3+, Ag+.

B. Ag+, Fe3+, H+, Mn2+.

C. Mn2+, H+, Ag+, Fe3+.

D. Ag+ , Mn2+, H+, Fe3+.

2. Dy cc ion xp theo chiu gim dn tnh oxi ho l (bit trong dy in ha, cp Fe3+/Fe2+ ng trc cp Ag+/Ag):

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

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

3. Cho: Al + HNO3 Al(NO3)3 + N2 + H2O. Cc h s pt ln lt l

A. 2,10,2,1,5 B. 5,18,5,3,9 C. 10,36,10,3,18 D. 1,6,1,2,3

4. Khi cho lun kh H2 d i qua ng nghim cha: Fe2O3; MgO; Al2O3; CuO; Fe3O4. Nung nng n khi p hon ton. Cht rn thu c trong ng nghim gm:

A. Fe; Cu; MgO; Al2O3

B. Al; Fe; Cu; MgO

C. Cu; FeO; Al2O3; MgO

D. Cu; Fe; Mg; Al2O3

5. Cho lung kh H2 (d) qua hn hp cc oxit CuO, Fe2O3, Na2O , MgO nung nhit cao. Sau phn ng hn hp rn thu c l:

A. Cu, Fe, Na, Mg.

B. Cu, Fe, Na2O, MgO.

C. Cu, FeO, Na2O, MgO. D. Cu, Fe, Na, MgO.

6. Cho 4 p: (1) Fe + 2HCl FeCl2 + H2; (2) 2NaOH + (NH4)2SO4 Na2SO4 + 2NH3 + 2H2O

(3) BaCl2 + Na2CO3 BaCO3 + 2NaCl ; (4) 2NH3 + 2H2O + FeSO4 Fe(OH)2 + (NH4)2SO4Cc phn ng thuc loi phn ng axit - baz l:

A. (1), (2). B. (2), (4). C. (2), (3). D. (3), (4).

7. Tng h s (nguyn ti gin) ca tt c cc cht trong p gia Cu vi d2 HNO3 c nng l:

A. 10 B. 8 C. 11 D. 9

8. Dung dch Cu(NO3)2 c ln AgNO3 . Cht no sau y c th loi b c tp cht:

A. Bt Ag d, lc B. Bt Al d, lc C. Bt Fed, lc D. Bt Cu d, lc

9. Trong cc nhm kim loi sau, nhm kim loi no tc dng c vi d2 mui Fe3+ :

A. Al; Fe; Ag; Cu; Zn B. Pb; Cu; Ag; Zn; Al

C. Au; Al; Cu; Zn; Ni D. Al; Fe; Ni; Cu; Zn;

10. Mnh khng ng l:

A. Fe2+ oxi ho c Cu. B. Fe3+ c tnh oxi ha mnh hn Cu2+.

C. Tnh oxi ha ca cc ion tng theo th t: Fe2+, H+, Cu2+, Ag+.

D. Fe kh c Fe3+ trong dung dch.

11. Cho 1,04g h2 hai kim loi ho tan hon ton trong d2 H2SO4 long thot ra 0,672 lit H2 (ktc). Khi lng mui sunfat thu c l:

A. 3,86g B. 1,96g C. 3,52g D. 3,92g

12. Cho cc phn ng sau: a) FeO + HNO3 (c, nng) ; b) FeS + H2SO4 (c, nng)

c) Al2O3 + HNO3 (c, nng) ; d) Cu + dung dch FeCl3 ; (f) Fe2O3 + HNO3

Dy gm cc phn ng u thuc loi phn ng oxi ha - kh l:

A. a, b, c, d, . B. a, b, c, C. a, b, d, f D. a, b, d

13. Cho Fe vo ln lt cc d2 mui sau: ZnCl2; CuSO4; Pb(NO3)2; NaNO3; MgSO4; AgNO3; NiCl2. C my trng hp xy ra p:

A. 4 B. 5 C. 6 D. 3

14. Khi cho Cu tc dng vi dung dch cha H2SO4 long v NaNO3, vai tr ca NaNO3 trong phn ng l:

A. cht kh. B. mi trng. C. cht xc tc. D. cht oxi ho.

15. in phn d2 NaCl in cc tr, khng c mng ngn. Sn phm thu c c th gm;

A. H2, Cl2, NaOH, NaCl B. H2, Cl2, nc javen

C. H2, NaOH, nc javen D. H2, NaOH, Cl2

16. in phn mt d2 mui MCln vi in cc tr. Khi catot thu c 16g kim loi M th anot thot ra 5,6lit kh (ktc). M l kim loi no sau y:

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

17. Dy gm cc kim loi c iu ch trong cng nghip bng phng php in phn hp cht nng chy ca chng l:

A. Na, Cu, Al. B. Fe, Ca, Al. C. Na, Ca, Zn. D. Na, Ca, Al.

18. in phn d2 cha ng thi 0,1mol NaCl; 0,05mol CuCl2; 0,04mol FeCl3; 0,03mol Zn(NO3)2. Kim loi u tin thot ra catot khi in phn d2 trn l:

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

19. in phn d2 cha hn hp 0,04 mol AgNO3 v 0,05 mol CuCl2, in cc tr, dng in 5A, trong 32pht 10 giy. Khi lng kim loi gii phng catot l:

A. 7,52g B. 4,32g C. 6,24g D. 6,72g

20. Kim loi khng tc dng vi dd H2SO4 c ngui l?

A. Al. B. Zn. C. Ag D. Cu.

21. Cho 4,8g Cu vo 100ml d2 AgNO3 0,1M. Sau khi kt thc p thu c m gam cht rn. Gi tr m l:

A. 6,32 B. 11,12g C. 12,64g D. 5,56g

22. Nhm kim loi khng tan trong c axit HNO3 nng v axit H2SO4 nng l

A. Ag, PtB. Pt, AuC. Cu, PbD. Ag, Pt, Au 23. Cho 11g hh Al v Fe tc dng vi dd HNO3 long d thu 6,72 lit NO (ktc).Khi lng Al v Fe ln lt l :

A. 8,1g v 2,9g B. 5,4g v 5,6g C. 4,05g v 6,95g D. 6,75g v 4,25g

24. Cho 6,9g Na vo 200g nc thu m gam dd v kh .Khi lng m l :

A. 200g B. 199,7g C. 206,9 gD. 206,6g

25. Ho tan hon ton m gam Cu trong d2 HNO3 (c, nng), sau p thu c 4,48 lit kh duy nht. Gi tr m l:

A. 12,4g B. 6,4g C. 4,8g D. 3,2g

26. Cho 2,8g Fe tc dng vi 400ml d2 HNO3 1M. Ta thu c d2 A v NO (sp kh duy nht). Khi c cn X , khi lng Fe(NO3)3 thu c l:

A. 24,2 B. 18g C. 12,1g D. 9g

27. in phn mui sunfat ca kim loi M ho tr II. Khi anot thu c 0,448 lit kh (ktc) th khi lng catot tng ln 2,368g. M l kim loi no sau y:

A. Ni B. Fe C. Cu D. Cd

28. Qu trnh no sau y khng ni v tnh kh ca kim loi

A. Fe + Cl2 FeCl3

B. FeO + HNO3 Fe(NO3)3 + NO+ H2O

C. Cu + HNO3 Cu(NO3)2 + NO+ H2O D. Zn + AgNO3 Zn(NO3)2 + Ag

29. C hai cp oxi ho-kh sau: Cu2+/Cu v Ni2+/Ni. Cch pht biu no sau y khng ng

A. Cu kh c Ni2+

B. Cu2+ oxi ho c Ni

C. Ni kh c Cu2+

D. Tnh oxi ho Cu2+ > Ni2+

30. Cch lm no sau y khng ng

A. pnc KOH thu c K B. Kh Fe2O3 bng H2 thu c Fe

C. p d2 AlCl3 thu c Al D. Zn tc dng vi d2 Cu(NO3)2 thu c Cu

31. Cho 20 g h2 Mg v Fe tc dng vi d2 HCl d thy c 1 g H2 bay ra. Khi lng mui thu c trong d2 l:

A. 45,5g B. 40,5g C. 55,5g D. 65.5g

32. Cho cc d2 sau: HCl(1); Fe2(SO4)3(2); HNO3(3); Cu(NO3)2(4); AgNO3(5); NaOH(6). Dd no ho tan c Cu

A. 3,5,4 B. 1,3,5 C. 2,5,6 D. 2,3,5

33. Cho 20g hn hp Al, Fe, Mg vo dd HCl , thu 13,44l H2(ktc) v dd A.C cn A thu m gam mui khan , m l :

A. 50,5 g B. 62,6 g C. 48,3g D. 55 ,9g

34. Nhng 1 l Zn vo 200ml dd AgNO3, sau khi p kt thc, ly l Zn ra , ra sch, lm kh th khi lng ca l Zn tng 15,1g ? nng dd AgNO3 l :

A. 1,2M B. 2M C. 1,5M D. 1M

35. Khi nhit phn, dy mui nitrat no u cho sn phm l oxit kim loi, NO2 v O2 ?

A.Cu(NO3)2; Fe(NO3)2; Mg(NO3)2

B. Zn(NO3)2; KNO3; Pb(NO3)2

C. Hg(NO3)2; AgNO3; NaNO3

D. Cu(NO3)2; Ba(NO3)2; AgNO3

36. Dy no di y gm cc ion c th tn ti trong mt dung dch :

A.Mg2+,NO3-, SO42-, Al3+

B. Na+, Ca2+, Cl-, CO32-

C.Cu2+, SO42-, Ba2+, NO3-

D. Zn2+, S2-, Fe3+, Cl-37. Nhm cc oxit kim loi no sau y u tc dng vi nc lnh to dd kim :

A. BaO, Na2O, K2O, CaO.

B. Na2O, K2O, MgO, CaO.

C. BeO, MgO, CaO, BaO.

D. K2O, Na2O, CaO, Al2O3.

38. Tnh cht ho hc chung ca cc kim loi kim, kim th, nhm l g ?

A. tnh kh mnh. B. tnh oxi ho yu.

C. tnh kh yu.D.tnh oxi ho mnh.

39.Cc ion no sau y u c cu hnh electron 1s22s22p6 ?

A. Na+, Mg2+, Al3+.

B. Na+, Ca2+, Al3+. C. K+, Ca2+, Mg2+. D.Ca2+, Mg2+, Al3+.

40. Kim loi khng tc dng vi dd H2SO4 c ngui l?

A. Cr. B. Zn. C. Ag D. Cu.

41. Kim loi khng tc dng vi dd H2SO4 c ngui l?

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

42/Xet phan ng : Cu + 2Ag+ Cu2+ + 2Ag

Cht b kh la : A. Cu B. Ag+ C. Cu2+ D. Ag43/ Khi so snh tnh cht ca Ca v Mg, cu no sau y khng ng?

A. s electron ho tr bng nhau

B. u tc dng vi nc nhit thng

C. Oxit u c tnh cht oxit baz

D. u c iu ch bng cch in phn clorua nng chy

44/ : Nhng nguyn t trong nhm IA ca bng tun hon c sp xp theo trnh t tng dn

A. Nguyn t khi

B. Bn knh nguyn t

C. in tch ht nhn ca nguyn t

D. S oxi ha.

45/ Mt thanh Zn ang tc dng vi dung dch HCl, nu thm vi git dung dch CuSO4 vo th

A. lng bt kh H2 bay ra khng i.

B. bt kh H2 khng bay ra na.

C. lng bt kh H2 bay ra t hn.

D. lng bt kh H2 bay ra nhanh hn.

46/ iu ch cc kim loi Na, Mg, Ca trong cng nghip, ngi ta dng cch no trong cc cch sau?

A- in phn dung dch mui clorua bo ho tng ng c vch ngn.

B- Dng H2 hoc CO kh oxit kim loi tng ng nhit cao.

C- Dng kim loi K cho tc dng vi dung dch mui clorua tng ng.

D- in phn nng chy mui clorua khan tng ng.

47/Dy kim loi no sau y c xp theo chiu tng dn ca tnh kh?

A- Al, Mg, Ca, K

B- K, Ca, Mg, Al C- Al, Mg, K, Ca

D- Ca, K, Mg, Al

48/ Nhng mt thanh Cu vo 200ml dung dch AgNO31M, khi phn ng xy ra hon ton, ton b Ag to ra u bm vo thanh Cu, khi lng thanh Cu s

A. tng 21,6 gam.

B. tng 15,2 gam. C. tng 4,4 gam.

D. gim 6,4 gam.

49/ Trong mt dung dch c cha a mol Ca2+ ; b mol Mg2+ ; c mol Cl( v d mol NO. Nu a = 0,01 ; c = 0,01 ; d = 0,03 th

A. b = 0,02

C. b = 0,03 . b = 0,01

D. b = 0,04

50/Cho hn hp cc kim loi kim Na, K ha tan ht vo nc c dung dch A v 0,672 lt kh H2 (ktc). Th tch dung dch HCl 0,1M cn trung ha ht mt phn ba dung dch A l:

A. 100 ml

B. 200 ml

C. 300 ml

D. 600 ml

51/ M t no di y v tnh cht vt l ca nhm l cha chnh xc?

A. Mu trng bc

B. L kim loi nh

C. Mm, d ko si v dt mngD. Dn in v nhit tt, tt hn cc kim loi Fe v Cu

52/. Cht lng tnh l cht

A. khng c c tnh axit v tnh baz B. lm i mu giy qu tm thnh v xanh

C. khng tan trong baz nhng tan trong axit D. phn ng c vi c axit v baz

53/. Nguyn t X c cu hnh electron 1s22s22p63s23p1. Ht nhn nguyn t X c:

A. 13 ntron; 14 electron

C. 14 ntron; 13 electron

B. 13 proton; 14 ntron

D. 13 ntron; 13 proton

54/ Khi nhit phn, dy mui nitrat no u cho sn phm l oxit kim loi, kh nit ioxit v kh oxi?

A. Zn(NO3)2, KNO3, Pb(NO3)2

B. Cu(NO3)2, Fe(NO3)2, Mg(NO3)2C. Cu(NO3)2, LiNO3, KNO3

D. Hg(NO3)2, AgNO3, KNO355/ . Cho hn hp kh X gm N2 ; NO ; NH3 ; hi H2O i qua bnh cha P2O5 th cn li hn hp kh Y ch gm 2 kh , 2 kh l:

A. N2 v NO C. NH3 v hi H2O B. NO v NH3 D. N2 v NH356/ . Trong dung dch c cha cc cation K+, Ag+, Fe2+, Ba2+ v mt anion. Anion l

A. Cl( C. NO

B. SO

D. CO

57/ : Tnh cht vt l no di y ca kim loi khng phi do cc electron t do gy ra?

A. nh kim.

B. Tnh do.

C. Tnh cng. D. Tnh dn in v nhit.

58/ : Tnh cht c trng ca kim loi l tnh kh v:

A. Nguyn t kim loi thng c 5, 6, 7 electron lp ngoi cng.

B. Nguyn t kim loi c nng lng ion ha nh.

C. Kim loi c xu hng nhn thm electron t n cu trc bn.

D. Nguyn t kim loi c m in ln.

59/ : Cho dng in 3A i qua mt dung dch ng (II) nitrat trong 1 gi th lng ng kt ta trn catot l:

A. 18,2 gam B. 3,56 gam C. 31,8 gam

D. 7,12 gam

60/:. Trong cc phn ng sau, phn ng no trong ion Na+ b kh thnh nguyn t Na?

A. 4Na + O2 ( 2Na2O

B. 2Na + 2H2O ( 2NaOH + H2.

C. 4NaOH ( 4Na + O2 + 2H2O

D. 2Na + H2SO4 ( Na2SO4 + H2.

MT S BI TP NH LNG V KLK, KLKT, NHM V HP CHT

1/ Cho 10 gam mt kim loi kim th tc dng ht vi nc thot ra 5,6 lt kh (ktc). Tn ca kim loi kim th l

A. Ba

B. Mg

C. Ca

D. Sr 2/ Cho 3,36 lt kh SO2 (ktc) hp th hon ton vo 200 ml dd NaOH 1M, sn phm thu c l:

a/ 0,1 mol Na2SO3

b/ 0,05 mol Na2SO3 v 0,1 mol NaHSO3

c/ 0,1mol Na2SO3 v 0,05 mol NaHSO3

d/ 0,2 mol NaHSO33/ . Cho 0,6 mol SO2 tc dng vi dung dch cha 0,5 mol NaOH th thu c bao nhiu gam mui?

A. 10,4 gam

B. 52 gam

C. 31,5 gam

D. 75,6 gam

4/ . Dn 3,92 (lt) kh SO2 (ktc) vo 74 (g) dung dch Ca(OH)2 10%. Sn phm thu c l:

a) Ca(HSO3)2 0,075 mol; CaSO3 0,025 mol.CaSO3

c) 0,1 mol; SO2 d 0,075 mol.

b) Ca(HSO3)2 0,0875 mol; Ca(OH)2 d 0,0125 mol. d) Ca(HSO3)2 0,025 mol; CaSO3 0,075.

5/ Cho 4,4 g CO2 tc dng vi 150 ml dung dch NaOH 1M th thu c

a. 0,1 mol Na2CO3

b. 0,05 mol NaHCO3 v 0,05 mol Na2CO3

c. 0,1 mol NaHCO3d. 0,1 mol NaHCO3 v 0,1 mol Na2CO3

6/ in phn nng chy mt mui clorat kim loi IA th thu c catt 6,24 g kim loi, ant 1,792 lit kh iu kin tiu chun. Cng thc ca mui l:

a. NaCl

c. CsCl

d. RbCl

d. KCl

7/ kh hon ton m gam hn hp CuO v PbO cn 8,1 gam kim loi nhm, sau phn ng thu c 50,2 gam hn hp 2 kim loi. Gi tr ca m lA. 54,4 gam.

B. 53,4 gam.

C. 56,4 gam.

D. 57,4 gam.

8/ Cho m gam hn hp bt Al v Fe tc dng vi dung dch NaOH d thot ra 6,72 lt kh (ktc). Nu cho m gam hn hp trn tc dng vi dung dch HCl d th thot ra 8,96 lt kh (ktc). Khi lng ca Al v Fe trong hn hp u l

A. 10,8 gam Al v 5,6 gam Fe.

B. 5,4 gam Al v 5,6 gam Fe.

C. 5,4 gam Al v 8,4 gam Fe.

D. 5,4 gam Al v 2,8 gam Fe.

9/ 31,2 gam hn hp bt Al v Al2O3 tc dng vi dung dch NaOH d thot ra 13,44 lt kh (ktc). Khi lng mi cht trong hn hp u l

A. 21,6 gam Al v 9,6 gam Al2O3

B. 5,4 gam Al v 25,8 gam Al2O3

C. 16,2 gam Al v 15,0 gam Al2O3 D. 10,8 gam Al v 20,4 gam Al2O3

10/ Cho dung dch cha 2,8 gam NaOH tc dng vi dung dch cha 3,42 gam Al2(SO4)3. Sau phn ng khi lng kt ta thu c l

A. 3,12 gam.

B. 2,34 gam.

C. 1,56 gam.

D. 0,78 gam.

11/ Cho 200 ml dung dch AlCl3 1,5M tc dng vi V lt dung dch NaOH 0,5M, lng kt ta thu c l 15,6 gam. Gi tr ln nht ca V l (cho H = 1, O = 16, Al = 27)

A. 1,2.

B. 1,8.

C. 2,4.

D. 2.

MT S BI TP NH LNG V ST, NG, CROM V HP CHT

1: Ho tan 5,6 gam Fe bng dung dch HNO3 long (d), sinh ra V lt kh NO (sn phm kh duy nht, ktc). Gi tr ca V l: A. 6,72.

B. 4,48.

C. 2,24.

D. 3,36.

2: Cho 10 gam hn hp gm Fe v Cu tc dng vi dung dch H2SO4 long (d). Sau phn ng thu c 2,24 lt kh hiro ( ktc), dung dch X v m gam cht rn khng tan. Gi tr ca m l (Cho H = 1, Fe = 56, Cu = 64)

A. 6,4 gam.

B. 3,4 gam.

C. 5,6 gam.

D. 4,4 gam.

3: Cho 20 gam hn hp bt Mg v Fe tc dng ht vi dung dch HCl thy c 1 gam kh H2 bay ra. Lng

mui clorua to ra trong dung dch l bao nhiu gam?

A. 40,5 gam. B. 45,5 gam. C. 55,5 gam. D. 60,5 gam.

4. Cho m gam Fe vo dung dch HNO3 ly d ta thu c 8,96 lit(kc) hn hp kh X gm 2 kh NO v NO2 c t khi hi hn hp X so vi oxi bng 1,3125. Gi tr ca m l

A. 0,56 gam.

B. 1,12 gam.

C. 11,2 gam.

D. 5,6 gam.

5: Cho kh CO kh hon ton n Fe mt hn hp gm: FeO, Fe2O3, Fe3O4 thy c 4,48 lt CO2 (ktc) thot ra. Th tch CO (ktc) tham gia phn ng l

A. 1,12 lt. B. 2,24 lt.

C. 3,36 lt. D. 4,48 lt.6: kh hon ton 30 gam hn hp CuO, FeO, Fe2O3, Fe3O4, MgO cn dng 5,6 lt kh CO ( ktc). Khi lng cht rn sau phn ng l A. 28 gam. B. 26 gam.

C. 22 gam.

D. 24 gam.

7: Kh hon ton 17,6 gam hn hp X gm Fe, FeO, Fe2O3 cn 2,24 lt CO ( ktc). Khi lng st thu c l A. 5,6 gam. B. 6,72 gam.

C. 16,0 gam.

D. 8,0 gam.

8: Kh hon ton m gam hn hp X gm FeO v Fe2O3 bng H2 (to), kt thc th nghim thu c 9 gam H2O v 22,4 gam cht rn. % s mol ca FeO c trong hn hp X l:

A. 66,67%. B. 20%. C. 67,67%. D. 40%.

9: Nung mt mu thp thng c khi lng 10 gam trong O2 d thu c 0,1568 lt kh CO2 (ktc). Thnh phn phn trm theo khi lng ca cacbon trong mu thp l A. 0,82%.

B. 0,84%.

C. 0,85%.

D. 0,86%.

10: Ho tan hon ton 2,81 gam hn hp gm Fe2O3, MgO, ZnO trong 500 ml axit H2SO4 0,1M (va ). Sau phn ng, hn hp mui sunfat khan thu c khi c cn dung dch c khi lng l

A. 3,81 gam.

B. 4,81 gam.

C. 5,81 gam.

D. 6,81 gam.

11: Cho 32 gam hn hp gm MgO, Fe2O3, CuO tc dng va vi 300ml dung dch H2SO4 2M. Khi lng mui thu c l A. 60 gam.

B. 80 gam.

C. 85 gam.

D. 90 gam.

12: Ha tn 10 gam hn hp bt Fe v Fe2O3 bng dd HCl thu c 1,12 lt kh (ktc) v dung dch A. Cho dung dch A tc dng vi NaOH d, thu c kt ta. Nung kt ta trong khng kh n khi lng khng i c cht rn c khi lng l:

A. 11,2 gam.

B. 12,4 gam.

C. 15,2 gam.

D. 10,9 gam.

13: Khi lung K2Cr2O7 cn dng oxi ho ht 0,6 mol FeSO4 trong dung dch c H2SO4 long lm mi

trng l (Cho O = 16, K = 39, Cr = 52)

A. 29,4 gam

B. 59,2 gam.

C. 24,9 gam.

D. 29,6 gam

14: Mun iu ch 6,72 lit khi clo (kc) thi khi lung K2Cr2O7 ti thiu cn dng tac dung vi dung dch HCl c, d la (Cho O = 16, K = 39, Cr = 52)

A. 29,4 gam

B. 27,4 gam.

C. 24,9 gam.

D. 26,4 gam

15: oxi ha hon ton 0,01 mol CrCl3 thnh K2CrO4 bng Cl2 khi c mt KOH, lng ti thiu Cl2 v KOH tng ng l

A. 0,015 mol v 0,04 mol.

B. 0,015 mol v 0,08 mol.

C. 0,03 mol v 0,08 mol.

D. 0,03 mol v 0,04 mol.

NI DUNG N TP: PHN BIT CHT V C

L THUYT

A. TRNG THI, MU SC CC N CHT, HP CHT

Cr(OH)2: vng

Cr(OH) 3: xanh

K2Cr2O7: da cam

KMnO4: tm

CrO3: rn, thm

Zn: trng xanh

Zn(OH)2: ( trng

Hg: lng, trng bc

HgO: mu vng hoc

Mn: trng bc

MnO: xm lc nht

MnS: hng nht

MnO2: en

H2S: kh khng mu

SO2: kh khng mu

SO3:lng, khong mu, si 450C

Br2: lng, nu

I2: rn, tm

Cl2:kh, vng

CdS: ( vng

HgS: (

AgF: tan

AgI: ( vng m

AgCl: ( mu trng

AgBr: ( vng nht

HgI2:

CuS, NiS, FeS, PbS, : en

C: rn, en

S: rn, vng

P: rn, trng, , en

Fe: trng xm

FeO: rn, en

Fe3O4: rn, en

Fe2O3: mu nu

Fe(OH)2: rn, mu trng xanh

Fe(OH)3: rn, nu

Al(OH)3: mu trng, dng keo tan trong NaOH

Zn(OH)2: mu trng, tan trong NaOH

Mg(OH)2: mu trng.

Cu:: rn,

Cu2O:: rn,

CuO: rn, en

Cu(OH)2: ( xanh lam

CuCl2, Cu(NO3) 2, CuSO4.5H2O : xanh

CuSO4: khan, mu trng

FeCl3: vng

CrO: rn, en

Cr2O3: rn, xanh thm

BaSO4: trng, khng tan trong axit.

BaCO3, CaCO3: trng

B. NHN BIT CHT KH

KhThuc thHin tngPhn ng

SO2- Qu tm mHa hng

- H2S, CO, Mg,Kt ta vngSO2 + H2S ( 2S( + 2H2O

- dd Br2,

ddI2,

dd KMnO4Mt muSO2 + Br2 + 2H2O ( 2HBr + H2SO4SO2 + I2 + 2H2O ( 2HI + H2SO4SO2 + 2KMnO4 + 2H2O ( 2H2SO4 + 2MnSO4 + K2SO4

- nc vi trongLm cSO2 + Ca(OH)2 ( CaSO3( + H2O

Cl2- Qu tm mLc u lm mt mu, sau xut hin mu Cl2 + H2O ( HCl + HClO

HClO ( HCl + [O] ; [O] O2

- dd(KI + h tinh bt) Khng mu ( xmCl2 + 2KI ( 2KCl + I2H tinh bt + I2 ( dd mu xanh tm

I2- h tinh btMu xanh tm

N2- Que dim Que dim tt

NH3- Qu tm mHa xanh

- kh HClTo khi trngNH3 + HCl ( NH4Cl

NO- Oxi khng khKhng mu ( nu2NH + O2 ( 2NO2

- dd FeSO4 20%Mu thmNO + ddFeSO4 20% ( Fe(NO)(SO4)

NO2- Kh mu nu, mi hc, lm qu tm ha 3NO2 + H2O ( 2HNO3 + NO

CO2- nc vi trongLm cCO2 + Ca(OH)2 ( CaCO3( + H2O

- qu tm mHa hng

- khng duy tr s chy

CO- dd PdCl2( , bt kh CO2CO + PdCl2 + H2O ( Pd( + 2HCl + CO2

- CuO (t0)Mu en ( CO + CuO (en) Cu () + CO2

H2- t c ting n. Cho sn phm vo CuSO4 khan khng mu to thnh mu xanhCuSO4 + 5H2O ( CuSO4.5H2O

- CuO (t0)CuO (en) ( Cu () H2 + CuO(en) Cu() + H2O

O2- Que dim Bng chy

- Cu (t0)Cu() ( CuO (en)Cu + O2 CuO

HCl- Qu tm mHa

- AgClKt ta trngHCl + AgNO3 AgCl(+ HNO3

H2S- Qu tm mHa hng

- O2Kt ta vng2H2S + O2 ( 2S( + 2H2O

Cl2H2S + Cl2 ( S( + 2HCl

SO22H2S + SO2 ( 3S( + 2H2O

FeCl3H2S + 2FeCl3 ( 2FeCl2 + S( + 2HCl

KMnO43H2S+2KMnO4(2MnO2+3S(+2KOH+2H2O

5H2S+2KMnO4+3H2SO4(2MnSO4+5S(+K2SO4+8H2O

- PbCl2Kt ta enH2S + Pb(NO3)2 PbS(+ 2HNO3

H2O(Hi)CuSO4 khanTrng ha xanhCuSO4 + 5H2O ( CuSO4.5H2O

O3dd KIKt ta tmKI + O3 + H2O ( I2 + 2KOH + O2

C. NHN BIT ION DNG (CATION)

IonThuc thHin tngPhn ng

Li+t

trn ngn la

v scNgn la mu thm

Na+Ngn la mu vng ti

K+Ngn la mu tm hng

Ca2+Ngn la mu da cam

Ba2+Ngn la mu lc (hi vng)

Ca2+dd, dd

( trngCa2+ + ( CaSO4 ;Ca2+ + ( CaCO3

Ba2+dd, dd

( trngBa2+ + ( BaSO4 ;Ba2+ + ( BaCO3

Na2CrO4Ba2+ +

( BaCrO4 (

Ag+HCl, HBr, HI

NaCl, NaBr,

NaIAgCl ( trng

AgBr ( vng nht

AgI ( vng mAg+ + Cl( ( AgCl (Ag+ + Br( ( AgBr (Ag+ + I( ( AgI (

Pb2+dd KIPbI2 ( vngPb2+ +2I( ( PbI2 (

Hg2+HgI2 ( Hg2+ +2I( ( HgI2 (

Pb2+Na2S, H2SPbS ( enPb2+ +S2( ( PbS (

Hg2+HgS ( Hg2+ +S2( ( HgS (

Fe2+FeS ( enFe2+ + S2(( FeS (

Cu2+CuS ( enCu2+ + S2( ( CuS (

Cd2+CdS ( vngCd2+ + S2( ( CdS (

Ni2+NiS ( enNi2+ + S2( ( NiS (

Mn2+MnS ( hng nhtMn2+ + S2( ( MnS (

Zn2+dd NH3( xanh, tan trong dd NH3 dCu(OH)2 + 4NH3 ( [Cu(NH3)4](OH)2

Cu2+( trng, tan trong dd NH3 dZn(OH)2 +4NH3 ( [Cu(NH3)4](OH)2

Ag+( trng, tan trong dd NH3 dAgOH +2NH3 ( [Cu(NH3)2]OH

Mg2+dd Kim( trngMg2+ + 2OH( ( Mn(OH)2 (

Fe2+( trng,

ha nu ngoi khng khFe2+ + 2OH( ( Fe(OH)2 (2Fe(OH)2 + O2 + 2H2O ( 2Fe(OH)3 (

Fe3+( nu Fe3+ + 3OH( ( Fe(OH)3 (

Al3+( keo trng

tan trong kim dAl3+ + 3OH( ( Al(OH)3 (Al(OH)3 + OH( ( + 2H2O

Zn2+( trng

tan trong kim dZn2+ + 2OH( ( Zn(OH)2 (Zn(OH)2 + 2OH( ( + 2H2O

Be2+Be2+ + 2OH( ( Be(OH)2 (Be(OH)2 + 2OH( ( + 2H2O

Pb2+Pb2+ + 2OH( ( Pb(OH)2 (Pb(OH)2 + 2OH( ( + 2H2O

Cr3+( xm, tan trong kim dCr3+ + 3OH( ( Cr(OH)3 (Cr(OH)3 + 3OH( (

Cu2+( xanhCu2+ + 2OH( ( Cu(OH)2 (

NH

NH3 ( + OH( NH3( + H2O

D. NHN BIT ION M (ANION)

IonThuc thHin tngPhn ng

Qu tmHa xanh

AgNO3( trngCl( + Ag+ ( AgCl( (ha en ngoi nh sng)

( vng nhtBr( + Ag+( AgBr( (ha en ngoi nh sng)

( vng mI( + Ag+ ( AgI( (ha en ngoi nh sng)

( vng+ 3Ag+ ( Ag3PO4(

( enS2( + 2Ag+ ( Ag2S(

BaCl2( trng+ Ba2+ ( BaCO3( (tan trong HCl)

( trng+ Ba2+ ( BaSO3( (tan trong HCl)

( trng+ Ba2+ ( BaSO4( (khng tan trong HCl)

( vng+ Ba2+ ( BaCrO4(

Pb(NO3)2( enS2( + Pb2+ ( PbS(

HClSi bt kh+ 2H+ ( CO2( + H2O (khng mi)

Si bt kh+ 2H+ ( SO2( + H2O (mi hc)

Si bt kh+ 2H+ ( H2S( (mi trng thi)

( keo+ 2H+ ( H2SiO3(

un nngSi bt kh2 CO2( + + H2O

Si bt kh2 SO2( + + H2O

Vn Cu, H2SO4Kh mu nu + H+ ( HNO33Cu + 8HNO3( 2Cu(NO3)2 + 2NO+4H2O

2NO + O2 ( 2NO2 (

H2SO4Kh mu nu do HNO2 phn tch2 + H+ ( HNO23HNO2 ( 2NO + HNO3 + H2O

2NO + O2 ( 2NO2 (

BI TP

Cu 1: Ch dng dung dch KOH phn bit c cc cht ring bit trong nhm no sau y?

A. Zn, Al2O3, Al.B. Mg, K, Na.

C. Mg, Al2O3, Al.D. Fe, Al2O3, Mg.

Cu 2: phn bit CO2 v SO2 ch cn dng thuc th l

A. dung dch Ba(OH)2.

B. CaO.

C. dung dch NaOH.D. nc brom.

Cu 3: C 5 dung dch ring r, mi dung dch cha mt cation sau y: NH4+, Mg2+, Fe2+, Fe3+, Al3+ (nng khong 0,1M). Dng dung dch NaOH cho ln lt vo tng dung dch trn, c th nhn bit ti a c my dung dch? A. 2 dung dch.B. 3 dung dch.

C. 1 dung dch. D. 5 dung dch.Cu 4: C 5 l cha ho cht mt nhn, mi l ng mt trong cc dung dch cha cation sau (nng mi dung dch khong 0,01M): Fe2+, Cu2+, Ag+, Al3+, Fe3+. Ch dng mt dung dch thuc th KOH c th nhn bit c ti a my dung dch?

A. 2 dung dch. B. 3 dung dch.

C. 1 dung dch. D. 5 dung dch.Cu 5: C 5 dung dch ho cht khng nhn, mi dung dch nng khong 0,1M ca mt trong cc mui sau: KCl, Ba(HCO3)2, K2CO3, K2S, K2SO3. Ch dng mt dung dch thuc th l dung dch H2SO4 long nh trc tip vo mi dung dch th c th phn bit ti a my dung dch?

A. 1 dung dch.

B. 2 dung dch.

C. 3 dung dch.

D. 5 dung dch.Cu 6: Kh CO2 c ln tp cht l kh HCl. loi tr tp cht HCl nn cho kh CO2 i qua dung dch no sau y l tt nht?

A. Dung dch NaOH d.

B. Dung dch NaHCO3 bo ho d.

C. Dung dch Na2CO3 d.

D. Dung dch AgNO3 d.

Cu 7: C cc l dung dch ho cht khng nhn, mi l ng dung dch khng mu ca cc mui sau: Na2SO4, Na3PO4, Na2CO3, Na2S, Na2SO3. Ch dng thuc th l dung dch H2SO4 long nh trc tip vo mi dung dch th c th c cc dung dch

A. Na2CO3, Na2S, Na2SO3.

B. Na2CO3, Na2S.

C. Na3PO4, Na2CO3, Na2S.

D. Na2SO4, Na3PO4, Na2CO3, Na2S, Na2SO3.

Cu 8: C 4 ng nghim khng nhn, mi ng ng mt trong cc dung dch khng mu sau(nng khong 0,01M): NaCl, Na2CO3, KHSO4 v CH3NH2. Ch dng giy qu tm ln lt nhng vo tng dung dch, quan st s i mu ca n c th nhn bit c dy cc dung dch no?

A. Hai dung dch NaCl v KHSO4.

B. Hai dung dch CH3NH2 v KHSO4.

C. Dung dch NaCl.

D. Ba dung dch NaCl, Na2CO3 v KHSO4.

Cu 9: phn bit dung dch Cr2(SO4)3 v dung dch FeCl2 ngi ta dng lng d dung dch

A. K2SO4.

B. KNO3.

C. NaNO3.

D. NaOH.

Cu 10: C 4 mu kim loi l Na, Ca, Al, Fe. Ch dng thm nc lm thuc th c th nhn bit c ti a

A. 2 cht.

B. 3 cht.

C. 1 cht.

D. 4 cht.

Cu 11: nhn bit ion NO3- ngi ta thng dng Cu v dung dch H2SO4 long v un nng, bi v:

A. to ra kh c mu nu.

B. to ra dung dch c mu vng.

C. to ra kt ta c mu vng.

D. to ra kh khng mu ha nu trong khng kh.

Cu 12: C 4 dung dch l: NaOH, H2SO4, HCl, Na2CO3. Ch dng mt ha cht nhn bit th dng cht no trong s cc cht cho di y?

A. Dung dch HNO3 B. Dung dch KOH. C. Dung dch BaCl2D. Dung dch NaCl.

Cu 13: Sc mt kh vo nc brom, thy nc brom b nht mu. Kh l

A. CO2.

B. CO.

C. HCl.

D. SO2.

Cu 14: Kh no sau c trong khng kh lm cho cc dng bng bc lu ngy b xm en?

A. CO2.

B. O2.

C. H2S.

D. SO2.

Cu 15: Hn hp kh no sau y tn ti bt k iu kin no?

A. H2 v Cl2.

B. N2 v O2.

C. HCl v CO2. D. H2 v O2.

NI DUNG N TP: HA HC V CC VN KINH T - X HI MI TRNG

Cu 1. Chn cu ng nht.

Trong sn xut,nhiu phn ng oxi ha kh chnh l c s ca cc qu trnh ho hc nh:

A. Luyn gang thp,luyn nhm

B. Sn xut xt,phn bn,thuc bo v thc vt.

C. C A v B ng

D. C A v B sai.

Cu 2. Kh thi cng nghip v kh thi t cc ng c t trong c ch yu cc kh:

A.SO2, H2 B. SO2, Br2

C.SO2, O3 D. SO2, NO, NO2, CO2

Cu3. Mt lng hn hp kh X thot ra t nh my thuc cng ty phn ln nung chy Vn in. Khi cho X i qua dung dch H2S,thy c vn c. X c ch yu l:

A.CO2 B.Cl2

C.F2 D.SO2

Cu 4. Nhng bc tng bng ,hay n th Talmaha n b ph hu mt phn l do:

A. Cc qu trnh oxi ha kh ca khng kh.

B. Nhit tng

C. Bo

D. Ma axit.

Cu 5.Nguyn nhn gy ma axit:

A.H2SO4 ng vai tr chnh, HNO3 ng vai tr th 2

B.H2SO4 ng vai tr chnh,HCl ng vai trt th 2

C.HNO3 ng vai tr chnh,HCl ong vai tr th 2

D.HNO3 ng vai tr chnh,H2SO4 ong vai tr th 2

Cu 6.Nc my,nc sinh hot,nc b bi thng c tit trng bi:

A.Ozon.

B.Flo.

C.Clo.

D.H2O2.

Cu7. Qu trnh sn xut nha PVC theo s :

C2H2 + HX A (trng hp)PVC. X l:

A.Flo. B.Brom.

C.Clo. D.Iot.

Cu 8. Khi m vi nc my, s thy c mi l-mi clo. S d clo c s dng st trng l v:

A. kh clo c,nn trong nc clo cng c.

B. Clo phn ng vi mt s mui khong to cht kh trng.

C. Clo phn ng vi nc to HCl cht c th kh trng.

D. Clo phn ng vu nc to HClO l cht c th kh trng.

Cu 9. Kh clo v KMnO4 l cc cht khc nhau, nhng kh nng dit khun l nh nhau.v:

A.Kh clo c tnh oxi ha mnh, KMnO4 c tnh kh mnh.

B.Kh clo c tnh kh ,KMnO4 c tnh oxi ha mnh.

C.Chng u c tnh kh nn mi kh trng c.

D.Trong nc chng c gii phng oxi nguyn t cht dit khun mnh.

Cu 10. Khi X trong v d dy c nng nh hn 0.00001 M th mc bnh kh tiu. Khi nng ln hn 0.001 M th mc bnh chua. Mt s thuc cha au d dy c cha mui NaHCO3. X l :

A.CH3COOH

B.HCl.

C.HCOOH.

D.NaOH.

Cu 11. C 4 cht bt mu trng: bt vi sng, bt go, bt thch cao, bt vi. Ch dung mt cht trong cc cht di y nhn ra bt go.

A. Dung dich HCl.

B. Dung dch H2SO4.

C. Dung dch Br2.

D. Dung dch I2.

Cu 12. Kh oxi c dng nhiu nht trong lnh vc:

A. Yt

B. Luyn thp.

C. Cng nghip ho cht.

D. Hn ct kim loi.

Cu 13. Tm cu sai:

A.Oxi oc dung tng cng qu trnh oxi ha trong cng nghip luyn kim

B.Hn hp oxi lng vi cc cht chy (mn ca,C,S..) c di l thuc n bng oxi lng.

C.Oxi tinh khit c dung trong y hc ,trong cc bnh ca th ln.

D.Oxi dung to hp chat Ag2O l cht nhy cm vi nh sang,trang ln phim nh.

Cu 14. un mt lng nh cht A vi MnO2 thu c kh X . Cho X tip xc vi giy tm dung dch KI v bt sn . Hin tng g xy ra?

A.Giy chuyn mu xanh do X l ozon.

B.Giy chuyn mu do X l ozon.

C.Giy khng chuyn mu v X l oxi.

D.Giy khng chuyn mu vi X l H2O2.

Cu 15. Chn cu ng nht. Nguyn nhn ph hu tng ozon l:

A.Do ozon phn ng vi cc kh thi thoat ra t cc ng c.

B.Do ozon phn ng vi gc Cl..

C.Do tc dng ca tia cc tm.

D.A,B,C ng.

Cu 16. Cht ny ln u tin oc C.Bethollet iu ch thnh ph (cht mang tn thnh ph) gn Pari.V nc ta,nh my ho cht Vit Tr, cc nh my nm trong khu cng nghip giy Bi Bng cng c sn xut bng cch in phn dung dch mui n. Cht ny l:

A.dung dch NaOH.

B.Dung dch HCl.

C.Dung dch Cl2.

D.Nc Javen.

Cu 17. Chn cu ng nht. st trng ln da khi b thng c th dng:

A.Cn it.

B.Cn clo.

C.Dung dch Cl2.

D. Dung dch H2SO4 c.

Cu 18. Sy kh rong to, t chy, ly tro. X l bng nc, sau cho H2SO4 c vo th thu c:

A.Clo v SO2.

B.Clo v H2S.

C.I2 v SO2

D.I2 v H2S.

Cu 19. Chn cu sai.

A.Dung dch NaF c dung lm thuc cha su rng.

B.Flo c dng trong cng nghip ht nhn lm giu 235U.

C. CFC (Freon) lm cht sinh hn trong t lnh v m iu ho.

D.Dung dch HF c tc dng st trng cho vit thng.

Cu 20. cha su rng, ngi ta c th s dng:

A.Dung dch NaF v CaF2.

B.Dung dch NaF v HClO3.

C.Dung dch NaF v NaI.

D.Kh O3 v dung dch NaF.

Cu 21. Trong cng nghip lu hunh c dung nhiu nht vo qu trnh:

A.Sn xut H2SO4.

B.Sn xut cht ty trng, bt giy, dim.

C.Sn xut thuc tr su.

D.Lu ho cao su.

Cu 22. Nhng bc tranh c c v bi cht bt, phm mu hu c. Khi lu trong khng kh thng c mu en.V:

A.O2(trong kk) phn ng vi bt st c trong tranh.

B.O2(trong kk) oxi ho cc hp cht hu c.

C.Do H2S(trong kk) phn ng vi bt st.

D.Do H2S(trong kk) phn ng vi bt ch.

Cu 23. Khi phun nc ra sch ng ph, ngi ta ri xung ng:

A.CuSO4 B.CaSO4.

C.CaCl2. D.Ca(NO3)2.

Cu24. C th phc hi nhng bc tranh mu en bng:

A.H2O. B.H2O2.

C.Cl2 D.F2.

Cu 25. Ngy 5 thng 12 nm 1952 ti Lun n (Anh) xy ra s kin: Mn khi git ngi lm chn ng th gii. Khi ny gy tc ngc,kh th v ho lin tc. Khi l:

A.Kh Cl2. B.Kh H2S C. Kh NO2 D. Kh SO2.

Cu 26. Khi nh rng, trong thnh phn kem nh rng c CaF2 gp phn to men. Men l:

A.Ca2(PO4)OH B.Ca2(PO4)O F

C. Ca2(PO4)F D.Ca2(PO4)HF.

Cu 27.Ngi b cm thng sinh ra nhng hp cht sunfua (hu c,v c) c tnh c.C th loi cht c ny bng :

A.Dy bc B. Dy Fe

C. ng.

D. Nhm.

Cu 28. Lng (gam) dc phm Nabica cn dung trung ho 10 ml HCl 0.04M c trong d dy l:

A. 0.336

B.0.636

C.0.366

D.0.663.

Cu 29. trung ho 788 ml HCl c trong d dy,cn dung 10ml sa magie. Bit rng c 1ml sa c 0,08 (g) Mg(OH)2. Ngi ny mc bnh:

A.Tiu chy.

B. chua.

C.Kh tiu. D.Vim ng rut.

Cu 30. Trong y hc, ngi ta dng mui sau chun on bnh ung th:

A.NaNO3 B.NaHCO3.

C.NaHSO4

D.NaCl.

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