The reversible reduction potential of pure water is –0.414V under 1 atm  $H_2$  pressure if the reduction is considered to be $2H^{+}+2e^{-}\to H_2$ . Then calculate the $\left[H^{+}\right]$  in pure water.
Write your answer in scientific notation and take it as $a\times {10}^{-b}$ .
Mark the value of b on the OMR (Use 2.303RT/F = 0.0591)