CaCO3 -> CaC2 + CO2CaC2 + 2H2O -> C2H2 + Ca(OH)2C2H2 + H2O -> C2H5OHC2H5OH + HCl -> C2H5Cl + H2OC2H5Cl -> C2H4 + HCl
CaCO3 -> CaC2 + CO2
CaC2 + 2H2O -> C2H2 + Ca(OH)2
C2H2 + H2O -> C2H5OH
C2H5OH + HCl -> C2H5Cl + H2O
C2H5Cl -> C2H4 + HCl