# What salts does calcium form with sulfide dianion, and with hydrogen sulfide anion?

$C a S$, $\text{calcium sulfide.........}$
$C a {\left(H S\right)}_{2}$, $\text{calcium hydrogen sulfide.........}$
Calcium forms a $C {a}^{2 +}$ ion, and thus requires 2 negative charges to form a neutral salt. The salts of ${H}_{2} S$ could be sulfides, ${S}^{2 -}$, or hydrogen sulfides, $H {S}^{-}$.