#CHROMIUM CHLORIDE USES SERIES#

The low reactivity of the d 3 Cr 3+ ion can be explained using crystal field theory. Slow reaction rates are common with chromium(III) complexes. The hydrated chlorides are prepared by treatment of chromate with hydrochloric acid and aqueous methanol. Similar hydration isomerism is seen with other chromium(III) compounds.Īnhydrous chromium(III) chloride may be prepared by chlorination of chromium metal directly, or indirectly by carbothermic chlorination of chromium(III) oxide at 650–800 ☌ Cr 2O 3 + 3 C + 3 Cl 2 → 2 CrCl 3 + 3 CO Two other hydrates are known, pale green Cl 2 It consists of the cation trans- + and additional molecules of water and a chloride anion in the lattice. The common hexahydrate can be more precisely described as Cl♲H 2O.

#CHROMIUM CHLORIDE USES SERIES#

Several members are known of the series of q+. The different forms exist both as solids and in aqueous solutions. The hydrated chromium(III) chlorides display the somewhat unusual property of existing in a number of distinct chemical forms (isomers), which differ in terms of the number of chloride anions that are coordinated to Cr(III) and the water of crystallization. If pressurized to 9.9 GPa it goes under a phase transition. For this reason, crystals of CrCl 3 cleave easily along the planes between layers, which results in the flaky ( micaceous) appearance of samples of chromium(III) chloride. The absence of cations in alternate layers leads to weak bonding between adjacent layers. Chromium chlorides find use as catalysts and as precursors to dyes for wool.Īnhydrous chromium(III) chloride adopts the YCl 3 structure, with Cr 3+ occupying one third of the octahedral interstices in alternating layers of a pseudo- cubic close packed lattice of Cl − ions. The anhydrous compound with the formula CrCl 3 are violet crystals, while the most common form of the chromium(III) chloride are the dark green crystals of hexahydrate, CrCl 3♶H 2O. nH 2O, among which are hydrates where n can be 5 (chromium(III) chloride pentahydrate CrCl 3♵H 2O) or 6 (chromium(III) chloride hexahydrate CrCl 3♶H 2O).It forms several hydrates with the formula CrCl 3 Chromium(III) chloride (also called chromic chloride) is an inorganic chemical compound with the chemical formula Cr Cl 3.

Chromium chloride uses