# How can you identify conjugate acid and base pairs?

The conjugate base of any acid is simply the parent acid LESS a proton, ${H}^{+}$. As with all chemical reactions, both mass and charge are conserved. The conjugate base of ${H}_{2} S {O}_{4}$ is thus bisulfate anion, $H S {O}_{4}^{-}$, and the conjugate baseof bisulfate is sulfate dianion, $S {O}_{4}^{2 -}$. For assignment of conjugate acid/base pairs all you are doing is simply adding or substracting a proton, ${H}^{+}$.
What is the conjugate acid of ammonia, $N {H}_{3}$? What is its conjugate base?