Chemistry - Ionic Equilibrium Question with Solution | TestHub

${\mathrm{N}}_2{\mathrm{H}}_4$ is a diprotic base with ${\mathrm{pK}}_{\mathrm{b}1}=5.2,{\mathrm{pK}}_{\mathrm{b}2}=16.7,0.1\mathrm{M}$ aq. solution of ${\mathrm{N}}_2{\mathrm{H}}_6{}^{2+}{\left({\mathrm{Cl}}^{-}\right)}_2$ has pH closest to $\_\_\_\_$ (choose the nearest integer).