1.so2->s-> h2s-> na2s-> so2

Question

1.so2->s-> h2s-> na2s-> so2

Answer 1

1.SO2= S+ O2
2.S+ H2= H2S
3.H2S+2Na=Na2S+H2
4.Na2S+3H2SO4=SO2 + 2NaHSO4 + 2H2O + S

Comments

1) 2H2S+SO2=3S+2H2O