An electrochemical cell was constructed with Fe^ 2+ / Fe and Cd^ 2+...

An electrochemical cell was constructed with $\mathrm{Fe}^{2+} / \mathrm{Fe}$ and $\mathrm{Cd}^{2+} / \mathrm{Cd}$ at $25^{{}^{{}^{\circ}}} \mathrm{C}$ with initial concentrations of \left[\mathrm{Fe}^{2+}\right]=0.800 \mathrm{M}$and \left[\mathrm{Cd}^{2+}\right]=0.250 \mathrm{M}$. The EMF of the cell when \left[\mathrm{Cd}^{2+}\right]$becomes 0.100 M is <table border="1"> <thead> <tr> <th>Half cell </th> <th>$E^0(V)$</th> </tr> </thead> <tbody> <tr> <td>$Fe^{2+}(aq) / Fe(s)$</td> <td>$-0.44$</td> </tr> <tr> <td>$Cd^{2+}(aq) / Cd(s)$</td> <td>$-0.40$</td> </tr> </tbody> </table>$