Question:
The reduction potential of hydrogen electrode at 25°C in a neutral solution is (P$_{H_2}$ = 1 bar)
The reduction potential of hydrogen electrode at 25°C in a neutral solution is (P$_{H_2}$ = 1 bar)
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Use Nernst equation: $E = E^\circ - 0.059 \cdot \text{pH}$ for hydrogen electrode under non-standard pH.
Updated On: May 18, 2025
- 0.059 V
- -0.059 V
- -0.413 V
- 0.0 V
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The Correct Option is C
Solution and Explanation
The standard hydrogen electrode (SHE) has a potential of 0 V only at pH = 0.
In a neutral solution (pH = 7), we apply the Nernst equation:
$E = 0 - 0.059 \cdot \text{pH} = -0.059 \cdot 7 = -0.413$ V
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