Calculate the e.m.f. of the cell: \[ \begin{array}{l} \mathrm{Pt}\left|\mathrm{H}_{2}(1.0 \mathr...

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Calculate the e.m.f. of the cell:
\[
\begin{array}{l}
\mathrm{Pt}\left|\mathrm{H}_{2}(1.0 \mathrm{~atm})\right| \mathrm{CH}_{3} \mathrm{COOH}(0.1 \mathrm{M}) \| \mathrm{NH}_{3} \\
(\text { aq. } 0.01 \mathrm{M}) \\
\mathrm{H}_{2}(1.0 \mathrm{~atm}) \mid \mathrm{Pt} \\
\mathrm{K}_{\mathrm{a}}\left(\mathrm{CH}_{3} \mathrm{COOH}\right)=1.8 \times 10^{-5} \text { and } \mathrm{K}_{\mathrm{b}}\left(\mathrm{NH}_{3}\right)=1.8 \times 10^{-5} \text {. }
\end{array}
\]
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