This guy now has an extra H ion. So it has the potential to donate one. So this guy becomes our bronchit Larry acid. So we see that this statement holds true whenever we have an acid that reacts with a base, a new base and a new acid are formed. So let's define conjugate acid base pairs. So a pair of molecules or ions related to each other by the loss or gain of a single H plus ion are called conjugate acid base pairs.