CaCO3+CO2+H2O=Ca(HCO3)2
Ca(HCO3)2=H2O+CO2+CaCO3- осадок
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2)СаО+Н2О=Са (ОН) 2
Ca(OH)2+CO2=CaCO3+H2O
CaCO3+CO2+H2O=Ca(HCO3)2
Ca(HCO3)2=H2O+CO2+CaCO3- осадок