Consider the dissociation equilibrium of the following weak acid HA ⇌ H^+( aq )+ A^-( aq ) If the pKa of the acid is 4, then the pH of 10 mM HA…

Consider the dissociation equilibrium of the following weak acid $\displaystyle \mathrm{HA} \rightleftharpoons \mathrm{H}^{+}(\mathrm{aq})+\mathrm{A}^{-}(\mathrm{aq})$ If the pKa of the acid is $\displaystyle 4$ , then the pH of $\displaystyle 10$ mM HA solution is $\displaystyle \_\_\_\_$.(Nearest integer) [Given: The degree of dissociation can be neglected with respect to unity]