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At 25°C, what is the electrode potential of a zinc electrode dipped in 0.1 M aqueous ZnSO4 solution? Given E°(Zn2+/Zn) = -0.76 V and take 2.303RT/F = 0.06 at 298 K.

1. +0.73
2. -0.79
3. -0.82
4. -0.70

Correct answer: -0.79

Solution

The electrode potential is calculated using the Nernst equation, which accounts for the concentration of zinc ions in the solution. Given the standard electrode potential and the concentration of ZnSO4, the calculated potential of -0.79 V reflects the shift in potential due to the concentration of ions, confirming that option B is correct.

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