Question

Са → СаС2 → С2Н2 → СО2 → СО → СО2 → Ca(HCO3)2 → CaCO3 → Ca(NO3)2 → Ca(OH)2 → СаСО3 → СО2

Answer 1

Ca+C=CaC2 CaC2+2H2O=Ca(OH)2+C2H2 2C2H2+5O2=4CO2+2H2O CO2+C=2CO 2CO+O2=2CO2 Ca(OH)2+2CO2=Ca(HCO3)2+H2O 2Ca(HCO3)2=CaCO3+CO2+H2O CaCO3+2HNO3=Ca(NO3)2+CO2+H2O Ca(NO3)2+2NaOH=Ca(OH)2+2NaNO3 Ca(OH)2+Na2CO3=CaCO3+2NaOH CaCO3=CaO+CO2