ZnCl2 + Na2S = ZnS + 2NaCl
Zn(+2) + 2Cl(-) + 2Na(+) + S(-2) = ZnS + 2Na(+) + 2Cl(-)
Zn(+2) + S(-2) = ZnS
ZnCl2 + Na2S = ZnS + 2NaCl
Zn(+2) + 2Cl(-) + 2Na(+) + S(-2) = ZnS + 2Na(+) + 2Cl(-)
Zn(+2) + S(-2) = ZnS