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What is the E°cell for the reaction Cu2+ (aq) + Sn2+ (aq) + Cu(s) + Sn4+ (aq) at 25°C if the equilibrium constant for the reaction is 1 × 10^6?

1. 0.5328 V
2. 0.3552 V
3. 0.1773 V
4. 0.7104 V

Correct answer: 0.5328 V

Solution

The relationship between E°cell and the equilibrium constant (K) is given by the Nernst equation: E°cell = (0.0591/n) log K. Here, n = 2 (number of electrons transferred), and K = 1 × 10^6. Substituting these values, E°cell = (0.0591/2) log(10^6) = 0.5328 V.

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