Answer
a) 2 $K^+$ and 1 $S^{2-}$
b) 1 $Co^{2+}$ and 1 $SO_4^{2-}$
c) 1 $K^+$ and 1 $MnO_4^-$
d) 3 $NH_4^+$ and 1 $PO_4^{3-}$
e) 1 $Ca^{2+}$ and 2 $ClO^-$
f) 1 $Na^+$ and 1 $CH_3CO_2^-$
Work Step by Step
a) $K_2S$: 2 $K^+$ and 1 $S^{2-}$
b) $CoSO_4$: $SO_4$ has a charge of $2-$, so 1 $Co^{2+}$ and 1 $SO_4^{2-}$
c) $KMnO_4$: 1 $K^+$ and 1 $MnO_4^-$
d) $(NH_4)_3PO_4$: 3 $NH_4^+$ and 1 $PO_4^{3-}$
e) $Ca(ClO)_2$: 1 $Ca^{2+}$ and 2 $ClO^-$
f) $NaCH_3CO_2$: 1 $Na^+$ and 1 $CH_3CO_2^-$
