CaCO3--->Cao--->Ca(OH)2--->Ca(HCO3)2--->CO2

Question

CaCO3--->Cao--->Ca(OH)2--->Ca(HCO3)2--->CO2

Answer 1

CaCO3 → CaO + CO2↑
CaO + H2O → Ca(OH)2
Ca(OH)2 + 2CO2 → Ca(HCO3)2
Ca(HCO3)2 при t° → CaCO3 + CO2↑ + H2O
:)