First slide

Nernst Equation

Question

Reduction potential of chlorine electrode in contact with 0.01 M HCl solution is $(E_{Pt, {Cl}_{2} / {Cl}^{-}}^{o} = + 1 .36 V)$

Easy

A

1.24 V
B

1.3 V
C

1.42 V
D

1.48 V

Solution

For non-metal electrodes
$\begin{array}{l} E_{RP} = E_{RP}^{o} - \frac{0 .0591}{n} \log [X^{- n}] \\ {Cl}_{2} + 2 e^{-} \to 2 {Cl}^{-} \\ E_{RP} = + 1 .36 - \frac{0 .0591}{2} \log {(0 .01)}^{2} \\ E_{RP} = 1 .36 - 0 .0591 \log 10^{- 2} \\ E_{RP} = 1 .48 V \end{array}$

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