Mg-(1)-MgO-(2)-MgSO4-(3)-Mg(OH)2-(4)-MgCl2
1)2Mg+O2=2MgO
2)MgO+H2SO4=MgSO4+H2O
3)MgSO4+2NaOH=Mg(OH)2+Na2SO4
4)Mg(OH)2+2HCL=MgCl2+2H2O
Zn-(1)- ZnO-(2)- ZnCl2-(3)-Zn(OH)2-(4) Na2ZnO2
1)Zn + O2 = ZnO
2)ZnO + HCl = ZnCl2
3)ZnCl2 + NaOH = Zn(OH)2
4)Zn(OH)2 + NaOH = Na2ZnO2 + H2O