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The electrode potentials for Cu2+(aq) + e- → Cu+(aq) and Cu+(aq) + e- → Cu(s) are +0.15 V and +0.50 V, respectively. The value of E° Cu2+/Cu will be :

1. 0.500 V
2. 0.325 V
3. 0.650 V
4. 0.150 V

Correct answer: 0.325 V

Solution

The overall cell potential for Cu2+/Cu can be calculated by adding the given electrode potentials: E°(Cu2+/Cu) = E°(Cu2+/Cu+) + E°(Cu+/Cu) = 0.15 V + 0.50 V = 0.325 V.

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