\underset{\text{formula equation}}{HNO_3(aq) + KOH(aq)} →HNO_3(aq) + H_2O(l)
\underset{\text{net ionic equation}}{H^+ + OH^-}→H_2O
The HNO_3, KOH , and KNO_3 are soluble, strong electrolytes. The K^+ and NO^-_3 ions are spectator ions, have not changed, and are not included in the net ionic equation. Water is a nonelectrolyte and is written in the molecular form.