The reduction of O_2 to H_2 O in acidic solution has a standard...

The reduction of $\mathrm{O}_2$ to $\mathrm{H}_2 \mathrm{O}$ in acidic solution has a standard reduction potential of 1.23 V . If the pH of the acid solution is increased by one unit, half cell potential will $\mathrm{O}_2(\mathrm{~g})+4 \mathrm{H}^{+}(\mathrm{aq})+4 \mathrme^{-} \rightarrow 2 \mathrm{H}_2 \mathrm{O}(\mathrm{l})$