Question

Traditional state of chromium in tetraaqua dichloro chromium chloride

Answer 1

I think the easiest way to see this is to count the formal charges on the ligands.

The four waters do not have net charge. The remaining ligands--the three Cl's--are likely Cl−ClX−, and so their total charge contribution is −3−3.

The only way the complex can be neutral is if the chromium has a +3+3 charge: hence Chromium (III).

Answer 2

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The anhydrous compound with the formula CrCl3is a violet solid. The most common form of the trichloride is the dark green "hexahydrate", CrCl. 6H2O. Chromium chloride finds uses as catalysts and as precursors to dyes for wool.