也可以把它理解为
Cl2 + H2O = Hcl +Hclo
Hcl+NaOH = NaCl +H2O
Hclo +NaOH = NaClO +H2O
最终联立方程式
Cl2+2NaOH=NaCl+NaClO(次氯酸钠)+H2O