Na2O+H2O=2NaOH
Cl2+H2O=HCl+HClO
所以 两式相加
Na2O+Cl2+2H2O=2NaOH+HCl+HClO
Na2O+Cl2+2H2O=NaCl+NaClO+2H2O
Na2O+Cl2=NaCl+NaClO