The equation for the neutralization reaction between nitric acid (HNO₃) and potassium hydroxide (KOH) can be written as follows:
\[ \text{HNO}_3 (aq) + \text{KOH} (aq) \rightarrow \text{KNO}_3 (aq) + \text{H}_2\text{O} (l) \]
In this reaction, nitric acid reacts with potassium hydroxide to produce potassium nitrate (KNO₃) and water (H₂O).