The chemical reactions involved are:

Iron (Fe) reacts with chlorine gas (Cl2) to form Iron (II) chloride (FeCl2).

2Fe + Cl2 -> 2FeCl2

Iron (II) chloride (FeCl2) can be further reacted with chlorine gas (Cl2) to form Iron (III) chloride (FeCl3).

2FeCl2 + Cl2 -> 2FeCl3

Iron (III) chloride (FeCl3) can react with water (H2O) to form Iron (III) hydroxide (Fe(OH)3).

FeCl3 + 3H2O -> Fe(OH)3 + 3HCl

Overall, the reactions can be summarized as:

Fe + Cl2 -> FeCl2
2FeCl2 + Cl2 -> 2FeCl3