Fe + 2HCl -> FeCl2 + H2
FeCl2 + 2NaOH -> Fe(OH)2 + 2NaCl
Fe(OH)2 + 3NaOH -> Fe(OH)3 + 3NaCl
4Fe(OH)3 -> Fe2O3 + 6H2O
4Fe2O3 -> 6Fe + 3O2
Fe + 2HCl -> FeCl2 + H2
FeCl2 + 2NaOH -> Fe(OH)2 + 2NaCl
Fe(OH)2 + 3NaOH -> Fe(OH)3 + 3NaCl
4Fe(OH)3 -> Fe2O3 + 6H2O
4Fe2O3 -> 6Fe + 3O2