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Why is FeCl3 the product, when Fe and Cl2 reacts and not FeCl2? | SocraticWhen iron is heated in a stream of dry chlorine the product is iron(III) chloride. This happens because chlorine is a powerful oxidising agent so brings out the higher oxidation state of iron: 2Fe_((s))+3Cl_(2(g))rarr2FeCl_(3(s)) To make iron(II) chloride you can react XS iron with dilute hydrochloric acid: Fe_((s))+2HCl_((aq))rarrFeCl_(2(aq))+H_(2(g))