2Fe + 3Cl₂ 2FeCl₃         3Fe + 2O₂ Fe₃O₄

Fe + S FeS                 2Fe+3Br₂＝2FeBr₃

Fe+I₂ FeI₂                  Fe+S FeS

3Fe+4H₂O(g) Fe₃O₄+4H₂     Fe+2HCl＝FeCl₂+H₂↑

Fe+CuCl₂＝FeCl₂+Cu             Fe+SnCl₄＝FeCl₂+SnCl₂

Fe + H₂S＝FeS+H₂↑

2Fe +6H₂SO₄(浓)＝Fe₂(SO₄)₃+3SO₂↑+6H₂O

Fe +H₂SO₄(稀)＝FeSO₄+H₂↑

Fe +6HNO₃＝Fe(NO₃)₃+3NO₂↑+3H₂O

Fe +4HNO₃＝Fe(NO₃)₃+NO↑+2H₂O

8Fe +30HNO₃＝8Fe(NO₃)₃+3N₂O↑+15H₂O

10Fe +36HNO₃＝10Fe(NO₃)₃+3N₂↑+18H₂O