CaO+H2O->CaOHCaOH+Na2CO3->CaCO3+NaOHCaOH+K2CO3->CaCO3+KOH
CaO+H2O=Ca(OH )2Ca(OH)2+Na2CO3=CaCO3↓+2NaOH Ca(OH)2+K2CO3=CaCO3↓+2KOH