Calculate the equilibrium constant,K,at 25°C for the galvanic cell reaction shown below: 8 H⁺(aq)+ 5 Fe²⁺(aq)+ MnO₄^-(aq)→ Mn²⁺(aq)+ 5 Fe³⁺(aq)+ 4 H₂O(l)E° = +0.74 V A)3.2 × 10^-⁵⁹ B)3.2 × 10^-¹⁰ C)3.2 × 10¹⁰ D)3.2 × 10⁶²

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Quizplus · Accepted Answer

The equilibrium constant K can be calculated using the Nernst equation: E° = (RT/nF)lnK. At 25°C, this simplifies to E° = (0.0592/n)logK. Given E° = +0.74 V and n = 5 (the number of electrons transferred), solving for K gives a very large value, approximately 3.2 × 10^62.

Calculate the Equilibrium Constant,K,at 25°C for the Galvanic Cell Reaction