1) Fe(OH)₂ (t, ин.атм.)= FeO + H₂O
2) 2FeO + 4H₂SO₄ = Fe₂(SO₄)₃ + 4H₂O + SO₂
Fe₂(SO₄)₃ (t)= Fe₂O₃ + 3SO₃
3) Fe₂O₃ + 6HCl = 2FeCl₃ + 3H₂O
4) FeCl₃ + 3NaOH = Fe(OH)₃ + 3NaCl
5) 2Fe(OH)₃ (t)= Fe₂O₃ + 3H₂O
6) Fe₂O₃ + 2Al (t)= Al₂O₃ + 2Fe
7) Fe + S (t)= FeS
8) 3FeS + 5O₂ = Fe₃O₄ + 3SO₂
Fe₃O₄ + H₂ (t=800°C)= 3FeO + H₂O