Ca---CaO---Ca(OH)2---CaCO3---Ca(HCO3)2---CO2

Question

Ca---CaO---Ca(OH)2---CaCO3---Ca(HCO3)2---CO2

Answer 1

2Ca + O2 → 2CaO
CaO + H2O → Ca(OH)2
Ca(OH)2 + K2CO3 → CaCO3↓ + 2KOH
CaCO3 + CO2 + H2O → Ca(HCO3)2
Ca(HCO3)2 → CaCO3↓ + H2O + CO2↑

Answer 2

2Ca+O2----->2CaO.
Ca+2HOH------Ca(OH)2
Ca(OH)2+H2CO3-----CaCO3+2H2O
CaCO3+CO2+H2O------Ca(HCO3)2
Ca(HCO3)2----->CaCO3+CO2+H2O