# Why does a strong acid have a weak conjugate base, whereas a weak acid has a relatively strong conjugate base?

Nov 9, 2015

The conjugate bases of strong acids are neutral.

#### Explanation:

Since strong acids completely dissociate in water, their conjugate bases cannot bond to a ${H}^{+}$.

This is why there is not an equilibrium when strong acids are in water.

Weak acid conjugate bases, however, have the ability to bond to ${H}^{+}$ ions, this creates an equilibrium in the solution.

Just remember the 6 strong acids and that their conjugate bases will not bond to a proton.
$H C l$
$H I$
$H B r$
$H N {O}_{3}$
${H}_{2} S {O}_{4}$
$H C l {O}_{4}$