Chemistry - Concentration Terms Question with Solution | TestHub

Electrolysis of NaCl (aq) gives hydrogen gas at cathode and oxygen gas at anode, the electrolyte solution contains NaOH after electrolysis.
Number of equivalents (W/E) of NaOH formed = 0.04
Normality$=\frac{\mathrm{W}}{\mathrm{E}\times \mathrm{V}}\times 1000$
Normality,$\mathrm{N}=\frac{0.04\times 1000}{400}=0.1$
$\left[\mathrm{O}{\mathrm{H}}^{-}\right]=0.1$M
pOH$=1$
So pH = 13.