2HCl + Na2S = 2NaCl + H2S
2H(+) + 2Cl(-) + 2Na(+) + S(-2) = 2Na(+) + 2Cl(-) + H2S
2H(+) + S(-2) = H2S
2HCl + Na2S = 2NaCl + H2S
2H(+) + 2Cl(-) + 2Na(+) + S(-2) = 2Na(+) + 2Cl(-) + H2S
2H(+) + S(-2) = H2S