Mg→MgCl2→Mg(NO3)2→Mg(OH)2→MgO
Mg+2HCl=MgCl2+H2 MgCl2++HNO3=Mg(NO3)2+2HCl Mg(NO3)2+2NaOH= Mg(OH)+2NaCl Mg(OH)2>MgO+H2O