The cell potential for the given cell at \( 298 \mathrm{~K} \) \( \mathrm{Pt} \mid \mathrm{H}_{2...

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The cell potential for the given cell at \( 298 \mathrm{~K} \) \( \mathrm{Pt} \mid \mathrm{H}_{2} \) (g, l bar) \( \left|\mathrm{H}^{+}(\mathrm{aq}) \| \mathrm{Cu}^{2+}(\mathrm{aq})\right| \mathrm{Cu}(\mathrm{s}) \) is \( 0.31 \mathrm{~V} \).
The \( \mathrm{pH} \) of the acidic solution is found to be 3 , whereas the concentration of \( \mathrm{Cu}^{2+} \) is \( 10^{-x} \mathrm{M} \).
The value of \( \mathrm{x} \) is
\[
\left(\text { Given }: \mathrm{E}_{\mathrm{Cu}^{(+/} / \mathrm{Cu}}^{\Theta}=0.34 \text { and } \frac{2.303 \mathrm{RT}}{\mathrm{F}}=0.06 \mathrm{~V}\right)
\]
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