CO2+2NaOH=Na2CO3+H2O
SO2+2NaOH=Na2SO3+H2O
SO3+2NaOH=Na2SO4+H2O
CO2+Ca(OH)2=CaCO3+H2O
SO2+Ca(OH)2=CaSO3+H2O
CO2+2KOH=K2CO3+H2O
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