2NaCl + 4H2O == 2NaOH + Cl2 + H2 (电解)H2 + Cl2 == 2HCl (点燃)CaCO3 == CaO + CO2 (高温)CaO + 3C == CaC2 + CO (高温)CaC2 + 2H2O -→ Ca(OH)2 + C2H2C2H2 + HCl -→ CH2=CHCl (高温、催化剂）氯乙烯 发生加聚...