Cobalt chloride Select one:
a. Forms a single hydrate which may be pink or blue
b. Is colorless in the presence of water
c. Does not exist as a hydrate
d. Forms different hydrates which have different colors

Forms different hydrates which have different colors

Explanation:

CoCl2 in its anhydrous form is blue in colour. This anhydrous compound could absorb moisture, first forming the purple dihydrate and absorbs more water molecules to form the hexahydrate. Hence various hydrates of cobalt II chloride have different colours as stated above. Equations of reaction for the formation of the two hydrates are attached.

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