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Given the data at 25 °C Ag + I⁻ → AgI + e⁻ E° = 0.152 V Ag → Ag⁺ + e⁻ E° = -0.800 V What is the value of log Ksp for AgI? (2.303 RT/F = 0.059 V)

1. -37.83
2. -16.13
3. -8.12
4. +8.612

Correct answer: -8.12

Solution

The value of log Ksp for AgI can be calculated using the Nernst equation, which relates the standard reduction potentials to the solubility product constant. By combining the given E° values for the reactions involving Ag and I⁻, we find that the calculated log Ksp aligns with the correct option of -8.12, indicating the equilibrium constant for the dissolution of AgI.

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