Question

Ca(HCO3)2->CaCO3->CaO->CaCl2->CaCO3

Answer 1

2CO2 + Ca(OH)2=Ca(HCO3)2

Ca(HCO3)2+Ca(OH)2=2 CaCO3+2H2O

CaCO3+2HCl= CaCl2+CO2+H2O

 

Answer 2

1) 2CO2 + Ca(OH)2=Ca(HCO3)2

2) Ca(HCO3)2+Ca(OH)2=2 CaCO3+2H2O

3) CaCO3+2HCl= CaCl2+CO2+H2O
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Все просто!