Chapter 17.7, Problem 17.12P

What is the pH of the solution in the anode compartment of the following cell if the measured cell potential at 25 °C is 0.28 V?

     $\text{Pt}\left(s\right)|{\text{H}}_{\text{2}}\left(1\text{atm}\right)|{\text{H}}^{\text{+}}\left(?\text{M}\right)||P{b}^{2+}\left(1\text{M}\right)|Pb\left(s\right)$