2Ca + O2 = 2CaO
CaO + H2O = Ca(OH)2
Ca(OH)2 + H2SO3 = CaSO3 + 2H2O
S + O2 = SO2
H2O + SO2 = H2SO3
H2SO3 + Ca(OH)2 = CaSO3 + 2H2O
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2Ca + O2 = 2CaO
CaO + H2O = Ca(OH)2
Ca(OH)2 + H2SO3 = CaSO3 + 2H2O
S + O2 = SO2
H2O + SO2 = H2SO3
H2SO3 + Ca(OH)2 = CaSO3 + 2H2O