The following reactions all have $K_c>1.$

$HF($aq$)()-($aq$)?F^{-}($aq$)+C_6{H}_5\frac{C}{O}OH($aq$)$

$()-($aq$)$

$HF(aq)+C_9{H}_7{O}_4^{-}(aq)?F^{-}($aq$)+H{C}_9{H}_7{O}_4($aq$)$

Arrange the substances based on their relative acid strength.

$H{C}_9{H}_7{O}_4$

strongest acid

$HF$

intermediate acid

$()-$

weakest acid

$F^{-}$

not a Bronsted$-$Lowry acid

$C_6{H}_5\frac{C}{O}OH$

$C_9{H}_7{O}_4^{-}$