Осуществить цепочку превращений
FeS→SO2→So3→H2SO4
↓ ↓
Na2SO3 Na2SO4
NiSO3 BaSO4
1)FeS+O2→SO2+Fe
SO2+MgO=SO3+Mg
SO3+H2O=H2SO4
2)SO2+Na2O=Na2SO3
Na2SO3+NiCl2=NiSO3+2NaCl
3)H2SO4+Na=Na2SO4+H2
Na2SO4+Ba(OH)2=BaSO4+2NaOH
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Answers & Comments
1)FeS+O2→SO2+Fe
SO2+MgO=SO3+Mg
SO3+H2O=H2SO4
2)SO2+Na2O=Na2SO3
Na2SO3+NiCl2=NiSO3+2NaCl
3)H2SO4+Na=Na2SO4+H2
Na2SO4+Ba(OH)2=BaSO4+2NaOH