The chemical equation to describe the creation of zinc(II) sulfide can be written as Zn2+ + S2- → ZnS. Zn2+ represents a zinc ion with a charge of +2. S2− represents an ion of sulfur that carries a charge of -2.
Zinc(II) sulfide can also be produced by combining zinc oxide and hydrogen sulfide as described in the chemical equation ZnO + H2S → ZnS + H2O. ZnO is the chemical formula for zinc oxide, and H2S is the chemical formula for hydrogen sulfide. The combination produces one molecule of zinc(II) sulfide and one molecule of H2O, which is the chemical formula for water.