First slide

Nernst Equation

Question

A silver electrode in contact with 1M AgNO₃ solution is diluted by 100 times. The true statement about the process is

Moderate

A

Reduction potential increases by 0.0591 V
B

Reduction potential decreases by 0.0591 V
C

Reduction potential increases by 0.118 V
D

Reduction potential decreases by 0.118 V

Solution

$\begin{array}{l} E_{1} = E^{o} + \frac{0 .0591}{1} \log 1 \\ E_{1} = E^{o} . . . . (1) \\ E_{2} = E^{o} + \frac{0 .0591}{1} \log \frac{1}{100} \\ E_{2} = E^{0} + \frac{0.0591}{1} \log 10^{- 2} \\ E_{2} = E^{o} - 2 (0 .0591) . . . (2) \end{array}$
Reduction potential decreases by 0.118V

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