You're very close! Here's how to write the net ionic equation for the reaction between potassium fluoride (KF) and nitric acid (HNO₃):

1. Write the balanced molecular equation:

KF(aq) + HNO₃(aq) → KNO₃(aq) + HF(aq)

2. Write the complete ionic equation:

K⁺(aq) + F⁻(aq) + H⁺(aq) + NO₃⁻(aq) → K⁺(aq) + NO₃⁻(aq) + H⁺(aq) + F⁻(aq)

3. Identify and cancel spectator ions:

Spectator ions are ions that appear on both sides of the equation and don't participate in the reaction. In this case, K⁺ and NO₃⁻ are spectator ions.

4. Write the net ionic equation:

H⁺(aq) + F⁻(aq) → HF(aq)

This equation shows the actual chemical change that occurs: hydrogen ions (H⁺) from nitric acid react with fluoride ions (F⁻) from potassium fluoride to form hydrofluoric acid (HF).