Examples of Chromium Compounds


Here is more information about chromium(III) chloride: Chromium(III) chloride also known as chromic chloride has the formula CrCl3. Its crystals are reddish violet. It has a common dark-green hexahydrate form (CrCl3.6H2O) whose lattice consists of trans-[CrCl2(H2O)4]+ cations and chloride anions beside water molecules and as a result it can be written as [CrCl2(H2O)4]Cl.2H2O. Other hydrated forms with colors ranging from light-green to violet also exist. Chromic chloride melts at 1152 C and decomposes at 1300 C. Chromium(III) chloride has some applications like its use in chromium plating and as catalyst for polymerization of olefins. Reaction of chromium(III) hydroxide (Cr(OH)3) with hydrochloric acid (HCl) can be used to obtain chromium(III) chloride hexahydrate:

Cr(OH)3 + 3HCl + 3H2O > CrCl3.6H2O




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