The correct balanced chemical equation for this reaction pathway is:
SO2 + 2S → 2H2S2H2S + 2NaOH → Na2S + 2H2ONa2S + SO2 → 3S + Na2SO3
The correct balanced chemical equation for this reaction pathway is:
SO2 + 2S → 2H2S
2H2S + 2NaOH → Na2S + 2H2O
Na2S + SO2 → 3S + Na2SO3