Chemistry - Ionic Equilibrium Question with Solution | TestHub

Only litre buffer solution was prepared by adding 0.10 mol each of ${\mathrm{NH}}_3$ and ${\mathrm{NH}}_4\mathrm{Cl}$ in deionised water. The change in pH on addition of 0.05 mol of HCl to the above solution is ________ $\times 10^{-2}$, (Nearest integer) (Given : ${\mathrm{pK}}_{\mathrm{b}}$ of ${\mathrm{NH}}_3=4.745$ and ${\log }_{10}3=0.477$)