Chemistry - Ionic Equilibrium Question with Solution | TestHub

$\mathrm{N}{\mathrm{H}}_4\mathrm{C}\mathrm{l}$is a salt of a strong acid and a weak base.

$\mathrm{pH}=\frac{1}{2}\left({\mathrm{pK}}_{\mathrm{w}}-{\mathrm{pK}}_{\mathrm{b}}-\mathrm{logC}\right)$

$=\frac{1}{2}\left[14-5-\log 2\times {10}^{-2}\right]$

$=\frac{1}{2}\left[9-\log 2-\log {10}^{-2}\right]$

$=\frac{1}{2}\left[9-\log 2+2\right]$

$=\frac{10.7}{2}=5.35$