S->SO2->H2SO3->H2SO4->ZnSO4->ZnS->H2S->SO2->SO3->H2SO4-> BaSO4
S+O2=SO2
SO2+H2O=H2SO3
H2SO4+2NaOH=Na2SO4+2H2O
5H2SO4+4Zn=4ZnSO4+H2S+4H2O
ZnSO4 + Na2S = ZnS + Na2SO4
ZnS + 2 HCl = ZnCl2 + H2S
2H2S + ЗО2 = 2Н2О + 2SO2
2SO2+O2= 2SO3
S03+H2O=H2SO4
H2SO4+BaCL2= BaSO4+2HCL
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S+O2=SO2
SO2+H2O=H2SO3
H2SO4+2NaOH=Na2SO4+2H2O
5H2SO4+4Zn=4ZnSO4+H2S+4H2O
ZnSO4 + Na2S = ZnS + Na2SO4
ZnS + 2 HCl = ZnCl2 + H2S
2H2S + ЗО2 = 2Н2О + 2SO2
2SO2+O2= 2SO3
S03+H2O=H2SO4
H2SO4+BaCL2= BaSO4+2HCL