# Question #4458f

SO32- to represent $S {O}_{3}^{2 -}$
And the conjugate acid of bisulfite, $H S {O}_{3}^{-}$, is sulfurous acid, ${H}_{2} S {O}_{3}$, which we could also represent as aquated sulfur dioxide, i.e. ${O}_{2} S \cdot {H}_{2} O$.........
And when amide ion, $N {H}_{2}^{-}$, acts as base, it ACCEPTS a proton to give ammonia, $N {H}_{3}$.
And when amide ion acts as an acid it gives the imide ion, $N {H}^{2 -}$, and when this species acts as an acid it gives the nitride ion, ${N}^{3 -}$. Of course the conjugate BASES of ammonia are UNKNOWN in water, but are known in liquid ammonia.