Pregunta: 9. ¿Cuál es el pH de una solución de HNO22.50M ? Ka=4.5×10−4

The equilibrium reaction is as under:

$\mathrm{HNO}{\phantom{A}}_2(\mathrm{aq})+\mathrm{H}{\phantom{A}}_2\mathrm{O}(\mathrm{l})\stackrel{-\rightharpoonup }{\leftharpoondown -}\mathrm{H}{\phantom{A}}_3\mathrm{O}{\phantom{A}}^{+}(\mathrm{aq})+\mathrm{NO}{\phantom{A}}_2{\phantom{A}}^{-}(\mathrm{aq})$

The initial concentration of $\left[\mathrm{H}\mathrm{N}{\mathrm{O}}_2\right]=2.50\mathrm{M}$