The standard EMF for the cell reaction $\mathrm{Zn}+\mathrm{Cu}^{2+} \rightarrow \mathrm{Cu}+\mathrm

Question

The standard EMF for the cell reaction $\mathrm{Zn}+\mathrm{Cu}^{2+} \rightarrow \mathrm{Cu}+\mathrm{Zn}^{2+}$ is 1.10 V at $25^{\circ} \mathrm{C}$. The EMF of the cell when $0.1 \mathrm{M} \mathrm{Zn}^{2+}$ and $0.1 \mathrm{M} \mathrm{Cu}^{2+}$ solutions are used at $25^{\circ} \mathrm{C}$ is

Professor PC Thomas Classes · Answer

Nernst eq: $E = E^0 - \frac{0.059}{2}\log(\frac{[\mathrm{Zn}^{2+}]}{[\mathrm{Cu}^{2+}]})$. Since ratio is 1, $\log(1)=0$, $E = E^0 = 1.10$ V.