S + O2 = SO2
SO2 + Ca(OH)2 = CaSO3↓ + H2O
S + Fe =t= FeS
FeS + 2HCl = FeCl2 + H2S↑
H2S + KOH = KHS + H2O
S + O2 = SO2
SO2 + Ca(OH)2 = CaSO3↓ + H2O
S + Fe =t= FeS
FeS + 2HCl = FeCl2 + H2S↑
H2S + KOH = KHS + H2O