2.2NaCl=2Na+Cl2
1.2Na+Cl2=2NaCl
3.2Na+H2O=2NaOH
4.2Na+O2=Na2O2
5.Na2O2+2Na=2Na2O
6.Na2O+H2O,=2NaOH
1.Ca+H2O=Ca(OH)2
2.Ca(OH)2+H2CO3=CaCO3+2H2O
3.2CaCO3+H2CO3=2Ca(HCO3)2
4.2Ca+O2=2CaO
5.CaO+2NaCl=Na2O+CaCl2
6.Ca(OH)2+KCl=CaCl2+2KOH
7.CaCl2+H2CO3=CaCO3+2HCl
8.CaCO3=t=CaO+CO2⬆