Question

HF is a weak acid but $H\left(FHF\right)$ is a strong acid.If true enter 1 or 0 for false.

Answer 1

Hydrofluoric acid is a weak acid because of its lower dissociation constant compared to the strong acids, $HF+H_{2}O\to H3O^{+}+F^{-}$. It does not fully ionize in dilute aqueous solutions. When the concentration of $HF$ approaches 100%, the acidity increases dramatically because of $3HF\to H2F^{+}+FH{F}^{-}$.