30б ...........................
2Fe+3Cl2=2FeCl3 4FeCl3+6H2O (электролиз) = 2Fe+2Fe(OH)3+3H2+6Cl2 FeCl3+3NaOH=Fe(OH)3+3NaCl 2Fe(OH)3=Fe2O3+3H2O Fe2O3+2Al=Al2O3+2Fe Fe+2HCl=FeCl2+H2