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(a) Why are some salts called hydrated s...

(a) Why are some salts called hydrated salts ?
(b) Give two examples of white coloured hydrated slts alongwith their chemical formula.

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(a) Salts which contain molecules of water of crystallisation are called hydrated salts.
(b) Give white coloured hydrated salts are:
Gypsum : `CaSO_(4).2H_(2)O,` Washing soda `:Na_(2)CO_(3).10H_(2)O.`
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