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1. Balance the following in redox reactions: H2O2+Sn+H2O+Sn** a. b. PbO2+Hg Hg,2+Pb2+ c. Al+ Cr202¬A}*+Cr** Solution oxidation: Sn²* (aq) 4+ 2+ → Sn* (aq) + 2e (a) reduction: H,0,(aq) + 2H* (aq) + 2e → 2H,0(1) overall: H,O, (aq) + 2H*(aq) + Sn" (aq) → 2H,O(1) + Sn" (aq) 2+ oxidation: 2Hg(l) Hg,"(aq) + 2e > (b) reduction: PbO, (s) + 4H* (aq) + 2e → Pb²* (aq)+ 2H,0(1) Hg," (aq) + Pb²* (aq) + 2H,0(1) overall: PbO, (s) + 4H'(aq) + reduction: Cr,O," (aq) + 14H (aq) + 6e (c) oxidation: 2 x (Al(s) Al" (aq)+ 3e) 2Hg(l) → 2Cr* (aq) + 7H,0(1) overall: Cr,0,² (aq) + 2Al(s) + 14H*(aq)- →2Cr** (aq) + 2AI* (aq) + 7H,O(1)

1. Balance the following in redox reactions: H2O2+Sn+H2O+Sn** a. b. PbO2+Hg Hg,2+Pb2+ c. Al+ Cr202¬A}*+Cr** Solution oxidation: Sn²* (aq) 4+ 2+ → Sn* (aq) + 2e (a) reduction: H,0,(aq) + 2H* (aq) + 2e → 2H,0(1) overall: H,O, (aq) + 2H*(aq) + Sn" (aq) → 2H,O(1) + Sn" (aq) 2+ oxidation: 2Hg(l) Hg,"(aq) + 2e > (b) reduction: PbO, (s) + 4H* (aq) + 2e → Pb²* (aq)+ 2H,0(1) Hg," (aq) + Pb²* (aq) + 2H,0(1) overall: PbO, (s) + 4H'(aq) + reduction: Cr,O," (aq) + 14H (aq) + 6e (c) oxidation: 2 x (Al(s) Al" (aq)+ 3e) 2Hg(l) → 2Cr* (aq) + 7H,0(1) overall: Cr,0,² (aq) + 2Al(s) + 14H*(aq)- →2Cr** (aq) + 2AI* (aq) + 7H,O(1)

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter21: Chemistry Of The Main-group Elements
Section: Chapter Questions
Problem 21.163QP
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Please help with parts (b) and (c).

 

1. Balance the following in redox reactions: a. H2O2+Sn²+→H2O+Sn** - b. PbO2+Hg→Hg++Pb²+ с. c. Al+ Cr2O Al3*+Cr*+ Solution oxidation: Sn²* (aq) - Sn* (aq) + 2e (a) reduction: H,0, (aq) + 2H* (aq)+ 2e 2H,O(/) 2+ overall: H,O, (aq) + 2H*(aq) + Sn (aq) 2H,0(/) + Sn“(aq) oxidation: 2Hg(l) → Hg,“ (aq) + 2e (b) reduction: PbO, (s) + 4H (aq) + 2e → Pb* (aq)+ 2H,O(1) overall: PbO, (s) + 4H"(aq) + 2Hg(l) → Hg,"(aq) + Pb²* (aq) + 2H,O(1) → 2Cr* (aq) + 7H,O(1) reduction: Cr,O,' (aq) + 14H* (aq) + 6e - (c) oxidation: 2 x (Al(s)- Al“ (aq) + 3e) overall: Cr,0, (aq) + 2Al(s) + 14H (aq) 2Cr* (aq) + 2Al* (aq) + 7H,0(1)
Transcribed Image Text:1. Balance the following in redox reactions: a. H2O2+Sn²+→H2O+Sn** - b. PbO2+Hg→Hg++Pb²+ с. c. Al+ Cr2O Al3*+Cr*+ Solution oxidation: Sn²* (aq) - Sn* (aq) + 2e (a) reduction: H,0, (aq) + 2H* (aq)+ 2e 2H,O(/) 2+ overall: H,O, (aq) + 2H*(aq) + Sn (aq) 2H,0(/) + Sn“(aq) oxidation: 2Hg(l) → Hg,“ (aq) + 2e (b) reduction: PbO, (s) + 4H (aq) + 2e → Pb* (aq)+ 2H,O(1) overall: PbO, (s) + 4H"(aq) + 2Hg(l) → Hg,"(aq) + Pb²* (aq) + 2H,O(1) → 2Cr* (aq) + 7H,O(1) reduction: Cr,O,' (aq) + 14H* (aq) + 6e - (c) oxidation: 2 x (Al(s)- Al“ (aq) + 3e) overall: Cr,0, (aq) + 2Al(s) + 14H (aq) 2Cr* (aq) + 2Al* (aq) + 7H,0(1)
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