The question will be based on the reaction below. Cr2+ (aq) + Pb2 (aq) --> Cr3+ (aq) + Pb (s) Standard Reduction Potentials Half-reaction Eo (V) Cr2O72- + 14H+ + 6e- --> 2 Cr3+ + 7 H2O 1.36 Cr3+ + e- --> Cr2+ -0.42 Cr3+ + 3e- --> Cr (s) -0.74 Cr2+ + 2e- --> Cr(s) -0.89 Pb4+ + 2e- --> Pb2+ 1.69 PbO2 (s) + 4 H+ + 2 e- --> Pb2+ + 2 H2O 1.458 Pb2+ + 2 e- --> Pb (s) -0.126 a) How many electrons are exchanged in a balanced redox reaction? b) What is Eocell for this reaction? c) What is ΔGo for this reaction (in kJ/mol)?
The question will be based on the reaction below. Cr2+ (aq) + Pb2 (aq) --> Cr3+ (aq) + Pb (s) Standard Reduction Potentials Half-reaction Eo (V) Cr2O72- + 14H+ + 6e- --> 2 Cr3+ + 7 H2O 1.36 Cr3+ + e- --> Cr2+ -0.42 Cr3+ + 3e- --> Cr (s) -0.74 Cr2+ + 2e- --> Cr(s) -0.89 Pb4+ + 2e- --> Pb2+ 1.69 PbO2 (s) + 4 H+ + 2 e- --> Pb2+ + 2 H2O 1.458 Pb2+ + 2 e- --> Pb (s) -0.126 a) How many electrons are exchanged in a balanced redox reaction? b) What is Eocell for this reaction? c) What is ΔGo for this reaction (in kJ/mol)?
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter17: Electrochemistry
Section: Chapter Questions
Problem 10E: Why is it not possible for hydroxide ion (OH-) to appear in either of the half-reactions or the...
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The question will be based on the reaction below.
Cr2+ (aq) + Pb2 (aq) --> Cr3+ (aq) + Pb (s)
Standard Reduction Potentials
| Half-reaction | Eo (V) |
|---|---|
| Cr2O72- + 14H+ + 6e- --> 2 Cr3+ + 7 H2O | 1.36 |
| Cr3+ + e- --> Cr2+ | -0.42 |
| Cr3+ + 3e- --> Cr (s) | -0.74 |
| Cr2+ + 2e- --> Cr(s) | -0.89 |
| Pb4+ + 2e- --> Pb2+ | 1.69 |
| PbO2 (s) + 4 H+ + 2 e- --> Pb2+ + 2 H2O | 1.458 |
| Pb2+ + 2 e- --> Pb (s) | -0.126 |
a) How many electrons are exchanged in a
b) What is Eocell for this reaction?
c) What is ΔGo for this reaction (in kJ/mol)?
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