Fe = FeCI2 = Fe (OH)2 = Fe (OH)3 = Fe(NO3)3
Fe + 2HCl -> FeCl2 + H2 FeCl2 + 2NaOH -> Fe(OH)2 + 2NaCl 4Fe(OH)2 + O2 +2H2O> 4Fe(OH)3 Fe(OH)3 + 3HNO3 -> Fe(NO3)3 + 3H2O