Chemistry - Ionic Equilibrium Question with Solution | TestHub

A solution of$0.1 \mathrm{M}$weak base$\left(\mathrm{B}\right)$is titrated with$0.1 \mathrm{M}$of a strong acid$\left(\mathrm{HA}\right)$. The variation of$\mathrm{pH}$of the solution with the volume of$\mathrm{HA}$added is shown in the figure below. What is the${\mathrm{pK}}_{\mathrm{b}}$of the base? The neutralization reaction is given by$\mathrm{B}+\mathrm{HA}\to {\mathrm{BH}}^{+}+{\mathrm{A}}^{-}$.