Make up the reaction equation: S- SO2- H2SO3- H2SO4- ZnSO4- ZnS- H2S- SO2- SO3- H2SO4- BaSO4

1. Combustion of sulfur with the release of sulfur dioxide.
S + O2 = SO2.
2. When sulfuric anhydride dissolves in water, sulfate acid is formed.
SO2 + H2O = H2SO3.
3. Reduction to sulfuric acid.
H2SO3 + Br2 + H2O = H2SO4 + 2HBr.
4. Obtaining zinc sulfate.
H2SO4 + ZnCl2 = ZnSO4 + 2HCl.
5. Passing gaseous hydrogen sulfide through the zinc salt.
ZnSO4 + H2S = ZnS + H2SO4.
6. Dissolution of zinc sulfide in acid to form zinc chloride.
ZnS + 2HCl = ZnCl2 + H2S.
7. Combustion of hydrogen sulfide.
2H2S + 3O2 = 2H2O + 2SO2.
8. Oxidation of sulfur dioxide.
2SO2 + O2 = 2SO3.
9. Getting sulfuric acid.
SO3 + H2O = H2SO4.
10. Reaction of acid with barium salt.
H2SO4 + BaCl2 = BaSO4 + 2HCl.