## Chemistry (4th Edition)

(a) $N{O_2}^-$ (b) $HS{O_4}^-$ (c) $HS^-$ (d) $CN^-$ (e) $HCOO^-$
A conjugate base is the result of taking a proton from the acid, therefore, all we need to do is: 1. Take one of the $H's$ out Ex: - $HNO_2$ -> $NO_2$ 2. Subtract 1 from the charge: Ex - $NO_2$ -> $N{O_2}^-$