CaCO3+H2O+CO2->Ca(HCO3)2
Ca(HCO3)2 -->CaCO3+H2
CaCO3+2HCl-->CaCl2+CO2+H2O
CaCl2+2H2O-->Ca(OH)2+2HCl
Ca(OH)2+H2CO3-->CaCO3+2H2O
CaCO3+H2O+CO2->Ca(HCO3)2
Ca(HCO3)2 -->CaCO3+H2
CaCO3+2HCl-->CaCl2+CO2+H2O
CaCl2+2H2O-->Ca(OH)2+2HCl
Ca(OH)2+H2CO3-->CaCO3+2H2O