S+Fe=>FeS
FeS+HCl=>FeCl2+H2S
H2S+K2SO3=>K2S+SO2+H2O
SO2+Na2O=>Na2SO3
Na2SO3+H2O=>Na2SO4+H2
Na2SO4+BaCl2=>2NaCl+BaSO4
S+Fe=>FeS
FeS+HCl=>FeCl2+H2S
H2S+K2SO3=>K2S+SO2+H2O
SO2+Na2O=>Na2SO3
Na2SO3+H2O=>Na2SO4+H2
Na2SO4+BaCl2=>2NaCl+BaSO4