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Given: E°Fe³⁺/Fe = -0.036 V E°Fe²⁺/Fe = -0.439 V The value of standard electrode potential for the change, Fe³⁺(aq) + e⁻ → Fe²⁺(aq) will be:

1. 0.385 V
2. 0.770 V
3. -0.270 V
4. -0.072 V

Correct answer: 0.385 V

Solution

The standard electrode potential for the reduction of Fe³⁺ to Fe²⁺ can be calculated using the formula E° = E°(Fe³⁺/Fe) - E°(Fe²⁺/Fe). Substituting the given values, we find E° = -0.036 V - (-0.439 V) = 0.385 V, confirming that option A is correct.

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