Lawrie Ryan and Roger Norris Solutions for Chapter: Electrochemistry, Exercise 20: Questions

Calculate the value of the electrode potential at $298 \mathrm{K}$ of a $\mathrm{Ni}\left(\mathrm{s}\right)/{\mathrm{Ni}}^{2+}\left(\mathrm{aq}\right)$ electrode that has a concentration of ${\mathrm{Ni}}^{2+}\left(\mathrm{aq}\right)$ ions of $1.5 \mathrm{mol} {\mathrm{dm}}^{-3}$. ${\mathrm{E}}^{°}=-0.25 \mathrm{V}$

Calculate the value of the electrode potential of silver/ silver ion electrode,  $\mathrm{Ag}\left(\mathrm{s}\right)/{\mathrm{Ag}}^{+}\left(\mathrm{aq}\right)$ at $298 \mathrm{K}$ when the concentration of ${\mathrm{Ag}}^{+}\left(\mathrm{aq}\right)$ ions is  $0.0002 \mathrm{mol} {\mathrm{dm}}^{-3}$. ${\mathrm{E}}^{°}=+0.80 \mathrm{V}$