What is the percentage of water in #CoCl_2 * 6H_2O#?

1 Answer
anor277
Jun 5, 2016

#"%Water = " "Mass of water"/"Molar mass of cobaltous chloride hexahydrate"xx100%#

Explanation:

So, #(6xx18.01*g*mol^-1)/(237.93*g*mol^-1)xx100%~=50%#

The hexahydrate has a beautiful purple colour. The anhydrous salt, #CoCl_2#, has an equally beautiful blue colour.

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