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Chemistry

Posted 10 months ago

55) What is the concentration of $\mathrm{Cu}^{2+}$ in the following cell at $25^{\circ} \mathrm{C}$ if the cell voltage is $0,952 \mathrm{~V}$ ?
$$\begin{array}{l}
\mathrm{Zn}\left|\mathrm{Zn}^{2+}(0.125 \mathrm{M}) \| \mathrm{Cu}^{2+}(?)\right| \mathrm{Cu} \\
\mathrm{Cu}^{2+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Cu}(\mathrm{s}) E^{\circ}=0.340 \mathrm{~V} \\
\mathrm{Zn}{ }^{2+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Zn}(\mathrm{s}) E^{\circ}=-0.763 \mathrm{~V}
\end{array}$$
A) $9 \times 10^{-4} \mathrm{M}$
B) $0.6 \mathrm{M}$
C) $1 \times 10^{-2} \mathrm{M}$
D) $1 \times 10^{-6} \mathrm{M}$
E) $4 \times 10^{-4} \mathrm{M}$

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