Textbook Problem

What is the $\text{pH}$ of a hydrogen ion solution if an $\text{H}$ electrode is connected to a ${\text{MnO}}_4^{-}/{\text{Mn}}^{2+}$ half-cell with $\left[{\text{MnO}}_4^{-}\right]=0.034m$ and $\left[{\text{Mn}}^{2+}\right]=0.288m$? $E=1.200\text{V}$. Assume $p_{{\text{H}}_{\text{2}}}=1\text{bar}$ .See Table 8.2 for $E°$ data.