Consider the following electrochemical cell: Pt | O_2( g )(1 bar )| HCl ( aq )|| M^2+( aq, 1.0 M )| M ( s ). The pH above which, oxygen gas would…

Consider the following electrochemical cell : $$\mathrm{Pt}\left|\mathrm{O}_2(\mathrm{~g})(1 \mathrm{bar})\right| \mathrm{HCl}(\mathrm{aq})\left|\left|\mathrm{M}^{2+}(\mathrm{aq}, 1.0 \mathrm{M})\right| \mathrm{M}(\mathrm{~s})\right. $$ The pH above which, oxygen gas would start to evolve at anode is $\displaystyle \_\_\_\_$ (nearest integer). $$\left[\begin{array}{ll} \text { Given : } & \left.\begin{array}{l}\mathrm{E}_{\mathrm{M}^{2+} / \mathrm{M}}^{\mathrm{o}}=0.994 \mathrm{~V} \\ \mathrm{E}_{\mathrm{O}_2 / \mathrm{H}_2 \mathrm{O}}^{\mathrm{o}}=1.23 \mathrm{~V}\end{array}\right\} \text { standard reduction potential } \\ & \text { and } \frac{\mathrm{RT}}{\mathrm{~F}}(2.303)=0.059 \mathrm{~V} \text { at the given condition } \end{array}\right] $$