## Chemistry (7th Edition)

(a) $S{O_4}^{2-}$ (b) $HS{O_3}^-$ (c) $HP{O_4}^{2-}$ (d) $NH_3$ (e) $OH^-$ (f) $N{H_2}^-$
To get the conjugate base of an acid, all we need to do is: remove a $(H^+)$ from the acid: 1. Remove one hydrogen from the formula: Ex: $NH_3 -- \gt NH_2$ 2. Subtract 1 from the charge: Ex: $NH_2 -- \gt N{H_2}^-$