Fe-Fe2O3-FeCl3-Fe2(SO4)3-Fe(OH)3-Fe2O3-Fe-FeCl3-AgCl Помогите не пойму

4Fe + 3O₂ = 2Fe₂O₃
Fe₂O₃ + 6HCl = 2FeCl₃ + 3H₂O
2FeCl₃ + 3Ag₂SO₄ = Fe₂(SO₄)₃ + 6AgCl
Fe₂(SO₄)₃ + 6KOH = 2Fe(OH)₃ + 3K₂SO₄
2Fe(OH)₃ = Fe₂O₃ + 3H₂O (t)
Fe₂O₃ + 3CO = 2Fe + 3CO₂
2Fe + 3Cl₂ = 2FeCl₃
FeCl₃ + 3AgNO₃ = Fe(NO₃)₃ + 3AgCl