Question:
A button cell used in watches functions as following
Zn(s) + Ag2O(s) + H2O(l) ⇌ 2Ag(s) + Zn2+ (aq) + 20H- (aq)
If half cell potentials are
Zn2+(aq) + 2e- → Zn(s); E° = -0.76 V
Ag2O(s) + H2O(l) + 2e- → 2Ag(s) + 20H-(aq),
E° = 0.34 V
The cell potential will be
A button cell used in watches functions as following
Zn(s) + Ag2O(s) + H2O(l) ⇌ 2Ag(s) + Zn2+ (aq) + 20H- (aq)
If half cell potentials are
Zn2+(aq) + 2e- → Zn(s); E° = -0.76 V
Ag2O(s) + H2O(l) + 2e- → 2Ag(s) + 20H-(aq),
E° = 0.34 V
The cell potential will be
Zn(s) + Ag2O(s) + H2O(l) ⇌ 2Ag(s) + Zn2+ (aq) + 20H- (aq)
If half cell potentials are
Zn2+(aq) + 2e- → Zn(s); E° = -0.76 V
Ag2O(s) + H2O(l) + 2e- → 2Ag(s) + 20H-(aq),
E° = 0.34 V
The cell potential will be
Updated On: May 21, 2024
- 1.10 V
- 0.42 V
- 0.84 V
- 1.34 V
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The Correct Option is A
Solution and Explanation
The correct option is (A): 1.10 V.
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