Chapter 19, Problem 105E

The cell potential of this electrochemical cell depends on the pH of the solution in the anode half-cell.

   $\text{Pt}\left(s\right)\left|{\text{H}}_{\text{2}}\left(g,\text{ 1 atm}\right)\right|{\text{H}}^{+}\left(aq,?\text{ M}\right)\parallel {\text{Cu}}^{\text{2}+}\left(aq,\text{ 1}.0\text{ M}\right)|\text{Cu}\left(s\right)$

What is the pH of the solution if $E_{\text{cell}}$ is 355 mV?