# How do you write a net ionic equation for the reaction that occurs when aqueous solutions of sodium hydroxide and hydrofluoric acid are combined?

$H F \left(a q\right) + H {O}^{-} \rightarrow {F}^{-} + {H}_{2} O \left(l\right)$
Unlike the other hydrogen halides, $H F$ is a reasonably poor acid. You should check its $p {K}_{a}$, but it is a fact that solution of $N a F$ give a basic solution. Hydroxide would deprotonate $H F$ quantitatively.