Answer
(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.
Work Step by Step
(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.
