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Question

Nemst equation for the $${E_{cell}}$$ of the following cell
$$Fe\left| {F{e^{2 + }}\left( {0.2M} \right)} \right|\left| {N{i^{2 + }}\left( {0.1} \right)M} \right|Ni$$

A

$${E^ \circ } + \frac{{RT}}{{2F}}\,In\,\,2$$

B

$${E^ \circ } + \frac{{RT}}{F}\,In\,\,0.2$$

C

$${E^ \circ } - \frac{{RT}}{{2F}}\,In\,\,2$$

D

$${E^ \circ } - \frac{{RT}}{F}\,In\,\,\frac{{0.2}}{{0.1}}$$

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Solution

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Correct option is D. $${E^ \circ } - \frac{{RT}}{F}\,In\,\,\frac{{0.2}}{{0.1}}$$

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