Chemistry - Ionic Equilibrium Question with Solution | TestHub

At $90^{\circ }\mathrm{C}$, pure water has $\left[{\mathrm{H}}^{+}\right]=10^{-6}\mathrm{M}$, if 100 ml of $0.2\mathrm{M}{\mathrm{HNO}}_3$ is added to 20 ml of 1 M NaOH at $90^{\circ }\mathrm{C}$ then pH of the resulting solution will be