Chemistry - Ionic Equilibrium Question with Solution | TestHub

Hydrolysis reaction is${\mathrm{X}}^{-}+{\mathrm{H}}_2\mathrm{O}\to \mathrm{H}\mathrm{X}+\mathrm{O}{\mathrm{H}}^{-}$
For a salt of weak acid with a strong base${\mathrm{K}}_{\mathrm{h}}=\frac{\mathrm{K}\mathrm{w}}{\mathrm{K}\mathrm{a}}=\mathrm{c}{\mathrm{\alpha }}^2=\frac{10^{-14}}{10^{-5}}=0.1\times {\mathrm{\alpha }}^2$
${\mathrm{\alpha }}^2=10^{-8}$
$\mathrm{\alpha }=10^{-4}$
so, the degree of hydrolysis$=10^{-4}\times 100=10^{-2}=0.01\mathrm{\%}$