The $\mathrm{pH}$ of a solution containing $0.1 \mathrm{M}$ of acetic acid and $0.05 \mathrm{M}$ of sodium acetate is __________ $\text{(rounded off to $2$ decimal places)}$.
The $\mathrm{pK}_{\mathrm{a}}$ value of ionization of acetic acid is $4.76$.
