Reaction

Gibbs free energy (kcal・mol^?1)

1) HF + F⁻ = ${\text{HF}}_2^{-}$

−28.1783

2) HF = H⁺ + F⁻

+190.5848

3) ${\text{HF}}_2^{-}$ = H⁺ + 2F⁻

+218.7631