## Chemistry and Chemical Reactivity (9th Edition)

(a) $HCO_2H$ is the strongest acid on this list. $C_6H_5OH$ is the weakest acid on this list. (b) $HCO_2H$ has the weakest conjugate base on this list. (c) $C_6H_5OH$ has the strongest conjugate base on this list.
(a) - The strongest acid is the one with the highest $Ka$ value. (b) - The stronger the acid, the weaker is the conjugate base, therefore, $HCO_2H$, which is the strongest acid, has the weakest conjugate base. (c) - The weaker the acid, the stronger is the conjugate base, therefore, $C_6H_5OH$, which is the weakest acid, has the strongest conjugate base.