Here's how to write the ionic equation for the reaction between hydrofluoric acid (HF) and sodium hydroxide (NaOH):

1. Write the balanced molecular equation:

HF(aq) + NaOH(aq) → NaF(aq) + H₂O(l)

2. Identify the strong electrolytes and write them as ions:

* HF is a weak acid, so it stays as HF(aq).

* NaOH is a strong base, so it dissociates into Na⁺(aq) and OH⁻(aq).

* NaF is a soluble salt, so it dissociates into Na⁺(aq) and F⁻(aq).

* H₂O is a weak electrolyte and remains as H₂O(l).

3. Write the complete ionic equation:

HF(aq) + Na⁺(aq) + OH⁻(aq) → Na⁺(aq) + F⁻(aq) + H₂O(l)

4. Cancel out spectator ions:

* Na⁺(aq) appears on both sides of the equation.

5. The net ionic equation is:

HF(aq) + OH⁻(aq) → F⁻(aq) + H₂O(l)