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Electrode Potential

Calculate E...

Question

Calculate $E_{c e l l}$ .
$P t (s) | H_{2} (g)_{1 a t m} | H A_{(K_{a} = 10^{- 7})} 1 M | | H B_{(K_{a} = 10^{- 5})} 1 M | H_{2} (g)_{1 a t m} | P t (s)$

0.06

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0.03

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0.04

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0.05

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Solution

The correct option is A $0.06$ V
$E_{c e l l} = E_{c e l l}^{0} - \frac{0.0591}{1} log \frac{[H A]}{[H B]}$
$= 0 - \frac{0.0591}{1} log (\sqrt{\frac{10^{- 7}}{10^{- 5}}})$
$= (0.1182 v / 2)$
$= 0.0591 V$

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