Fe(OH)3 → FeCl3 → FeCl2 → Fe(OH)2

The transformation is as follows:

Iron (III) hydroxide (Fe(OH)3) reacts with hydrogen chloride (HCl) to form iron (III) chloride (FeCl3) and water (H2O).Iron (III) chloride (FeCl3) reacts with iron (II) chloride (FeCl2) to form iron (II) chloride (FeCl2) and iron (III) chloride (FeCl3).Iron (II) chloride (FeCl2) reacts with sodium hydroxide (NaOH) to form iron (II) hydroxide (Fe(OH)2) and sodium chloride (NaCl).