CI-HCI-FeCL3-Fe(OH)3-Fe2O3-Fe

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CI represents the compound interest in this chemical reaction. HCI is hydrochloric acid. FeCl3 is iron(III) chloride. Fe(OH)3 is iron(III) hydroxide. Fe2O3 is iron(III) oxide. Fe represents iron as an element.

In this reaction, iron(III) chloride reacts with hydrochloric acid to form iron(III) hydroxide, which then dehydrates to form iron(III) oxide. The overall reaction can be represented as:

FeCl3 + 3HCl -> Fe(OH)3 + 3Cl-
Fe(OH)3 -> Fe2O3 + 3H2O

Iron(III) oxide is a common form of iron oxide, also known as rust. This reaction demonstrates the transformation of iron between different oxidation states in the presence of acid.