1. FeS + HCl → FeCl2 + H2S
2. H2S + SO2 (to) → S + H2O
3. S + H2 (to)→ H2S
4. S + Fe (to) → FeS
5. S + F2 → SF6
6. S + Hg → HgS
7. S + O2 → SO2
8. SO2 + H2S → S + H2O
9. SO2 + H2O → H2SO3
10. SO2 + O2 (t0, xt V2O5) → SO3
11. SO3 + H2O → H2SO4
12. H2SO4 đặc + Mg → MgSO4 + H2S + H2O
13. H2S + HNO3 đặc, nóng → H2SO4 + NO2 + H2O
14. SO3 + NaOH → NaHSO4
15. NaHSO4 + NaOH → Na2SO4
16. Na2SO4 + BaCl2 → NaCl + BaSO4
17. H2S + KOH → KHS + H2O
18. AgNO3 + KHS → Ag2S + KNO3 + H2S
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