The cell potential for the following cell $\mid$
$$
\mathrm{Pt}\left|\mathrm{H}_2(\mathrm{~g})\right| \mathrm{H}^{+}(\mathrm{ag})| | \mathrm{Cu}^{2+}(0.01 \mathrm{M}) \mid \mathrm{Cu}(\mathrm{~s})
$$
is 0.576 V at 298 K . The pH of the solution is $\_\_\_\_$ .
(Nearest integer)
