Chemistry help..10 point for best answer ..pls?

Question

When chlorine is passed over heated iron, abrown iron chloride is formed:

Give one reason why chlorine gives this brown chloride with iron, not the same chloride formed with dilute hydrochloric acid.

Answer 1

Chlorine is a powerful oxidising agent and so the higher oxidation state of iron (+III rather than +II) is formed.  The anhydrous FeCl3 formed in this reaction is predominantly covalent (it's soluble in organic solvents).

2Fe + 3Cl2 --> 2FeCl3

If iron is added to HCl hydrogen, a good reducing agent, is produced, and so the lower oxidation state is favoured.  The solution contains [Fe(H2O)6]2+ ions, which are green.

Fe + 2HCl -->  FeCl2 + H2

Answer 2

2Fe + 3Cl2 -> 2FeCl3

the ions that are contained in FeCl3 are Fe3+ ions and Cl- ions...

Fe is transition element so it can form coloured ions and has different oxidation number. Fe3+ ion is brown in colour so it gives the compound a brown colour...

*Fe2+ is green colour and Fe3+ is brown colour