26. DAY THE DIEN CUC CHUAN
26.1. Cho cac ion kim loai: Zn^^, Sn'^^, Ni-^+ , Fê^ , Pb^+. Thii tu tính oxi hoa
giam din la
Ạ P b 2 + > S n 2 + > F e 2 + > N i 2 + > Z n 2 + . B. S n 2 + > N i 2 + > Z n 2 + > P b 2 + > F e 2 + . C. Z n 2 + > S n 2 + > N i 2 + > F e 2 + > P b 2 + . D. Pb2+ > Sn^^ > Ni^^ > Fe2+ > Zn^^.
;.2. Trong pin dien hoa Zn - Cu, qua trinh khu trong pin la
Ạ Zn -> Zn^*+2ẹ B. Cu Cu2+ + 2ẹ C. Zn2+ + 2e ^ Zn. D. Cu^^ + 2e -> Cụ C. Zn2+ + 2e ^ Zn. D. Cu^^ + 2e -> Cụ
.3. Cho suat dien dgng chuan É cua cac pin dien hoa: E"(Cu - X) = 0,46V;
E"(Y - Cu) = 1,1V; E"(Z - Cu) = 0,47V (X,Y,Z la ba kim loai).
Day cac kim loai xe'p theo chieu tang dSn tinh khu ttr trai sang phai la
Ạ Z, Y, Cu, X. B. X, Cu, Z, Ỵ
C. Y, Z, Cu, X. D. X, Cu, Y, Z.
-4. Cho biet phan ling oxi hoa - khir xay ra trong pin dien hoa Fe - Cu la
Fe + Cu-+ -» Fê^ + Cu
E"( Fê^ /Fe) = -0,44V; E"( Cu^^ /Cu) = +0,34V. Suat dien dOng chuan cua pin dien hoa Fe - Cu la Suat dien dOng chuan cua pin dien hoa Fe - Cu la Ạ 1,66V. B. 0,10V. C. 0,78V. D. 0,92V.
i.5. Thir tu m6t so cap oxi hoa khir trong day dien hoa nhu sau:
Mg2^ / Mg, Fê^ / Fe, Cu^^ / Cu, FéV Fê^, Ag^ / Ag. Day chi g6m cac chat, ion tac dung dugc voi ion Fê"" trong dung dich la chat, ion tac dung dugc voi ion Fê"" trong dung dich la
ẠFe, Cu, Ag" B.Mg, Fé^ Ag
C.Mg,CụCu^* D.Mg,Fe,Cu
26.6. Cho cac thé dien cue chudn :E° u = -1,66V ; E°2„:./zn = "^''^^V ;
2+ XT:2+' _2 + .2+
Pb-' /Pb = -0,l3V;E°j,^:,^^^, =+0,34V. Trong cac pin sau day, pin nao CO suat dien dgng chuan Ion nhat? nao CO suat dien dgng chuan Ion nhat?
Ạ PinZn Cu B. Pin Al-Zn C. Pin Zn-Pb D. Pin Pb-Cu C. Pin Zn-Pb D. Pin Pb-Cu
. Cho suát dien dong chudn cua cac pin dien boa: Z n - Cu la 1,1V; Cu- Ag la 0,46V. Diet the dien cue chu^n E"^^./^^ = + 0 , 8 V . Thé dien cue la 0,46V. Diet the dien cue chu^n E"^^./^^ = + 0 , 8 V . Thé dien cue
chudn E°7j^2.^2n^^ ^°Cu-*/Cu CO gia tri Ian luot la
Ạ + 1,56V va + 0,64V B. - 1.56V va +0,64V C - 1,46V va - 0,34 V D. - 0,76V va + 0,34V C - 1,46V va - 0,34 V D. - 0,76V va + 0,34V
26.8. Dien phan (dien cue tro) dung dieh X chiia 0,2 mol C U S O 4 va 0,12 mol NaCl bang dong dien c6 cudng dO 2Ạ Th^ tich ichi (dktc) thoat ra d anot NaCl bang dong dien c6 cudng dO 2Ạ Th^ tich ichi (dktc) thoat ra d anot
sau 9650 giay dien phan la
Ạ 1,792 lit. B. 2,240 lit. C. 2,912 lit. D. 1,344 lit. C. 2,912 lit. D. 1,344 lit.
26.9. Cho so d6 chuyen hoa:
Fe304+dung dich Hl(du) - ^ X + Y + H A
Biét X va Y la san phdm cudi ciing cua qua trinh chuyen hoạ Cac chát X va Y la va Y la
A. F e v a 4 B. Fel, va Felz.
CFeljvalz. D.Fel3val2.
26.10. Dien phan dung djch CUSO4 v6i anot bang d6ng (anot tan) va dien phan dung dich CUSO4 vdi anot bang graphit (dien cue tro) d^u c6 dae di^m dung dich CUSO4 vdi anot bang graphit (dien cue tro) d^u c6 dae di^m chung la
Ạ 6 anot xay ra su oxi hoa: Cu Cu^* + 2ẹ
B. d catot xay ra su khijr: Cu^* + 2e ^ Cụ
C. 6 catot xay ra su oxi hoa: 2H2O + 2e ->• 20H + Hj. D. d anot xay ra su khur: 2H2O - ^ 0 2 + 4H'' + 4ẹ D. d anot xay ra su khur: 2H2O - ^ 0 2 + 4H'' + 4ẹ
26.11. Chobiet: Ê^^./^^^-2,37V; E « „ . / , „ =-0,76 V; E°p,./p,= ^ , 1 3 V ; Ecu=7cu = +0,34V. Ecu=7cu = +0,34V.
Pin dien hoa c6 suát dien dOng ehuan bang 1,61V dugc cáu tao boi hai cap oxi hoa - khic cap oxi hoa - khic
Ạ Zn^VZn va Cu^VCụ B. Pb^VPb va Cu^VCụ C. Mg^ W g va Zn^^/Zn. D. Zn^^/Zn va Pb^^/Pb. C. Mg^ W g va Zn^^/Zn. D. Zn^^/Zn va Pb^^/Pb.
W 27. CROM, DONG, NIKEN, CHI, KEM, BAC, VANG, THIEC
27.1. Khi cho 41,4 gam h6n hop X g6m FdjO,, CrjO, v^ A1,0, tac dung vdi
dung dich NaOH dac (du), sau phan ling thu duoc chat ran c6 khtfi lugng 1 16 gam. Dé khir hoan toan 41,4 gam X bang phan img nhiet nhOm, phai 1 16 gam. Dé khir hoan toan 41,4 gam X bang phan img nhiet nhOm, phai dung 10,8 gam A l . Thanh phSn phdn tram theo khÓi luong cua Cr2d3
trong h6n hop X la (Cho hieu suát ciia cac phan ling la 100%)
Ạ 50,67%. B. 20,33%.
C. 66,67%. D. 36,71%.
27.2. Thue hien hai thi nghiem :
1) Cho 3,84 gam Cu phan ling vdi 80 ml dung dich HNO, I M thoat ra V, lit NỌ lit NỌ
2) Cho 3,84 gam Cu phan ling vdi 80 ml dung dich chiJa H N O 3 I M va
H2SO4 0,5M thoat ra V2 lit NỌ
Bie't NO la san ph^m khix duy nha't, cdc th^ tich khi do d cting di^u kien.
Quan he giua V, va V j la
A. V 2 = 1,5V,. B. V 2 = 2V,.
C.V2 = 2,5V,. D.V2 = V,.
27.3. Nung h6n hop b6t g6m 15,2 gam Cr203 va m gam A l d nhiet d6 caọ Sau khi phan ung hoan toan, thu dugc 23,3 gam h6n hop ran X. Cho toan bd khi phan ung hoan toan, thu dugc 23,3 gam h6n hop ran X. Cho toan bd
h6n hgp X phan img vdi axit HCl (du) thoat ra V lit khi (d dktc). Gia
tri cua V la
Ạ 3,36. B. 4,48.
C. 7,84. D. 10,08.
27.4. Cho cac phan ling :
(1) C U 2 O + C U 2 S
(3) CuO + CO
(2)Cu(N03)2 -(4) CuO + N H 3 (4) CuO + N H 3 SÓ phan ling tao ra kim loai Cu la
Ạ 3. B.2.
C . l . D.4.
27.5. Phat biéu khong dung la
Ạ Hgp chat Cr(II) c6 tmh khic dac trung con hgp chát Cr(VI) c6 tinh oxi hoa manh. hoa manh.
B. Cac hgp chSft Cr203, Cr(OH)3, CrO, Cr(0H)2 d^u c6 tinh chát ludng tinh. ludng tinh.
C. Cac hap chat CrO, Cr(OH)2 tac dung duac vdi dung djch HCl con
Cr203 tac dung dugc vdi dung dich NaOH.
D. Them dung dich ki6m vao muoi dicromat, muoi nay chuydn thanh muói cromat.
27.6. Dc thu kty Ag tinh khiet thir hOn hop X (gom a mol Al^O,, b mol CuỌ
c niol AgpO), ngutji ta hoa tan X bdi dung dich chiia (6a + 2b + 2c) mol UNO, dirge dung dich Y, sau do thfim (gia thiet hieu suat cac phan ling deu la 100%)
Ạ c mol bgt A l vao Ỵ B. c mol bol Cu vao Ỵ C. 2c mot bgt A l vao Ỵ D. 2c mol bgt Cu vao Ỵ
27.7. Co 4 dung dich muoi rieng biet : CuClj. ZnClj, FeCl^, AlCl,. Neu them
dung dich KOM (du) roi them tiep dung djch N H , (dir) vao 4 dung dich tren Ihi so chat ket tua thu dugc la
Ạ 4 B. 1 C. 3 D. 2
27.8. Cho 3,2 gam bgt Cu lac dung vcJi 100 ml dung dich h6n hgp g6m UNO;
0,8M va II2SO4 0,2 M . Sau khi phan irng xay ra hoan toan, sinh ra V lit khi NO (san pham khir duy nhat, 0 dkic). Gia iri cua V la
"Ạ 0,746. B 0,672. C. 0.448. D. 1,792.
27.9. Cho so do chuyen hoa quang dong thanh dong:
CuFeS2 - i ^ ^ X Y Cu Hai chat X, Y Ian lugt la
Ạ CU2O , CuỌ B. CuS, CuỌ
C. CU2S, CU2Ọ D. CujS.CuỌ
27.10. De oxi hoa hoan toan 0,01 mol CrCl, thanh K2Cr04 bang CI2 khi c6 mfit KOH, lugng loi thieu Clj va KOH tuong ung la KOH, lugng loi thieu Clj va KOH tuong ung la
Ạ 0,03 mol va 0,08 mol. B. 0.015 mol va 0,08 mol. C. 0,015 mol va 0,04 mol. D. 0,03 mol va 0,04 mol.
27.11. Cho cac dung dich: HCl, NaOH dac, NH3, KCl. So dung dich phan iJng dugc vcfi Cu(0H)2 la dugc vcfi Cu(0H)2 la
Ạ 1 dung dich. B. 3 dung dich.
C. 2 dung dich. D. 4 dung dich. j
27.12. Cho mOt lugng bdt Zn vao dung djch X g6m FeClj va CuCl^. KhÓi
lugng chat ran sau khi cac phan irng x^y ra hoan toan nho han khdi lugng
bOt Zn ban dSu la 0,5 gam. CO can phan dung djch sau phan ung thu dugc 13,6 gam muÓi khan.
T6ng khÓi lugng cac muÓi trong X la
Ạ 13,1 gam. B. 17,0 gam. C. 19,5 gam. D. 14,1 gam.
27.13. Dan tOr tir V lit khi CO (cr dktc) di qua 6'ng sir dung lugng du hOn hgp
ran gom CuO, FcjO, (d nhiet d6 cao). Sau khi cac phan irng xay ra hoan loan, thu dugc khi X. Dan toan b6 khi X cf trfin vao lugng du dung djch CăOH)2 thi tao thanh 4 gam ket tiiạ
Gia trj cua V la
Ạ 1,120. B. 0,896. C. 0,448. D. 0,224.
27.14. Cho day cac chát: Cr(OH)3 , Al2(S04)3, Mg(OH)2 , Zn(0H)2 , MgO,
Cr03.
S6' chat trong day c6 tinh cha't luong tinh la Ạ 5. B. 2. C. 3. D. 4.
7.15. Cho 13,5 gam h6n hgp cac kim loai A l , Cr, Fe tac dung vdi lugng du
dung djch H2SO4 loang nong (trong dieu kien khong c6 khong khi), thu dugc dung djch X va 7,84 lit khi H2 (cf dktc). Co can dung dich X (trong
di^u kifin kh6ng c6 kh6ng khi) dugc m gam mu6'i khan. Gia tri cua m la
Ạ 48,8. B. 42,6.
C.47,1. D.45,5.
7.16. Nung nong 16,8 gam h6n hgp g6m Au, Ag, Cu, Fe, Zn v6i mOt lugng du
khi O2, de'n khi cac phan irng xay ra hoan toan, thu dugc 23,2 gam chat ran X. Th^ tich dung djch HCl 2M vira du dé phan ung vdri chat ran X la Ạ 400 ml. B. 200 m]
C. 800 ml. D. 600 ml.
7.17. Cho 100 ml dung dich FeClj 1,2M tac dung vdi 200 ml dung djch
AgNO, 2M, thu dugc m gam ke't tuạ Gia tri cua m la
Ạ 34,44. B.47,4. C. 30,18. D. 12,96.
27.18. Cho 61,2 gam h6n hop X g6m Cu va Fe304 tdc dung v6i dung dich HNO3 loang, dun nong va khuáy 66ụ Sau khi cac phan utig xay ra hoan toan, loang, dun nong va khuáy 66ụ Sau khi cac phan utig xay ra hoan toan, thu dugc 3,36 lit khi NO (san ph^m khir duy nhát, d dktc), dung dich Y va con lai 2,4 gam kim loaị C6 can dung dich Y, thu dugc m gam mu6'i khan. Gia tri cua m la
Ạ 137,1. B. 108,9. C. 97,5. D. 151,5. C. 97,5. D. 151,5.
27.19. Cho m gam b6t Fe vao 800 ml dung djch h6n hop g6m Cu(N03)2 0,2M va H2SO4 0,25M. Sau khi cac phan urig xay ra hoan toan, thu dugc 0,6m va H2SO4 0,25M. Sau khi cac phan urig xay ra hoan toan, thu dugc 0,6m gam h6n hgp b6t kim loai va V lit khi NO (san phdm khur duy nhát, 6 dktc). Gia tri cua m va V l5n lugt la
Ạ 10,8 va 4,48. B. 10,8 vh 2,24.
C. 17,8 va 4,48. D. 17,8 va 2,24.
27.20. Hoa tan hoan toan 1,23 gam h6n hgp X g6m Cu va A l vao dung dich
HNO3 dac, nong thu dugc 1,344 lit khi NO2 (san phdm khir duy nhát, a
dktc) va dung dich Ỵ Sue tiT tir khi NH, (du) vao dung dich Y, sau khi phan lirg xay ra hoan toan thu duoc m gam két tuạ PhSn tram \i kh6'i phan lirg xay ra hoan toan thu duoc m gam két tuạ PhSn tram \i kh6'i lurgng cua Cu trong h6n hgp X va gia tri cua m l^n lugt la
Ạ 78,05% va 2,25. B. 21,95% va 2,25. C. 78,05% va 0,78. D. 21,95% va 0,78. C. 78,05% va 0,78. D. 21,95% va 0,78.
27.21. Khi hoa tan hoan toan 0,02 mol Au bang nude cudng toan thi s6' mol HCl phan ifeg va s6' mol NO (san phdm khir duy nha't) tao thanh Mn lugt la phan ifeg va s6' mol NO (san phdm khir duy nha't) tao thanh Mn lugt la Ạ 0,03 va 0,01. B. 0,06 va 0,02.
C. 0,06 va 0,01. D. 0,03 va 0,02.
27.22. Nung 6,58 gam Cu(N03)2 trong binh km kh6ng chiia kh6ng khi, sau m6t thori gian thu dugc 4,96 gam chat ran va h5n hgp khi X. Hap thu hoan thori gian thu dugc 4,96 gam chat ran va h5n hgp khi X. Hap thu hoan toan X vao nude di dugc 300 ml dung dich Ỵ
Dung dich Y c6 pH bang
Ạ 1. B.4. C. 3. D. 2. C. 3. D. 2.
27.23. Cho lu6ng khi CO (du) di qua 9,1 gam h6n hgp g6m CuO va AI2O3 nung nong den khi phan ling hoan toan, thu dugc 8,3 gam chát ran. nong den khi phan ling hoan toan, thu dugc 8,3 gam chát ran.
Kh6'i lirgng CuO c6 trong h6n hgp ban d^u la Ạ 4,0 gam. B. 0,8 gam. Ạ 4,0 gam. B. 0,8 gam. C. 8,3 gam. D. 2,0 gam. 27.24. Trucmg hgp xay ra phan ung Ik
Ạ Cu + HCl(loang) > B. Cu + HCl(loang) + O2 >