1.Na2O+H2O = 2NaOH
2.3FeCl2+2Al = 2AlCl3+3Fe
3.2FeCl3+3Ca(OH)2 = 2Fe(OH)3+3CaCl2
2Fe3++6Cl-+3Ca2++6OH- = 2Fe(OH)3+3Ca2++6Cl-
Fe3++3OH-=Fe(OH)3
4.2HNO3+Zn(OH)2 = Zn(NO3)2+2H2O
2H++2NO3-+Zn(OH)2 = Zn2++2NO3-+2H2O
1.Na2O+H2O = 2NaOH
2.3FeCl2+2Al = 2AlCl3+3Fe
3.2FeCl3+3Ca(OH)2 = 2Fe(OH)3+3CaCl2
2Fe3++6Cl-+3Ca2++6OH- = 2Fe(OH)3+3Ca2++6Cl-
Fe3++3OH-=Fe(OH)3
4.2HNO3+Zn(OH)2 = Zn(NO3)2+2H2O
2H++2NO3-+Zn(OH)2 = Zn2++2NO3-+2H2O