Chapter 8, Problem 8.67E

Hydrofluoric acid, $\text{HF}\left(\text{aq}\right)$, is a weak acid that is not completely dissociated in solution.

(a) Using the thermodynamic data in Appendix $2$, determine $\Delta H°$, $\Delta S°$, and $\Delta G°$ for the dissociation process.

(b) Calculate the acid dissociation constant, $K_{\text{a}}$, for $\text{HF}\left(\text{aq}\right)$ at $25°\text{C}$. Compare it to a handbook value of $3.5\times {10}^{-4}$.