Which of the following salts does not contain water of crystallisation?(a) Blue vitriol(b) Baking soda(c) Washing soda(d) Gypsum
Question
Which of the following salts does not contain water of crystallisation?
(a) Blue vitriol
(b) Baking soda
(c) Washing soda
(d) Gypsum
Solution
The salt that does not contain water of crystallisation among the given options is (b) Baking soda.
Here's why:
(a) Blue vitriol is Copper(II) sulfate pentahydrate (CuSO4.5H2O). It contains 5 molecules of water of crystallisation.
(b) Baking soda is Sodium bicarbonate (NaHCO3). It does not contain any water of crystallisation.
(c) Washing soda is Sodium carbonate decahydrate (Na2CO3.10H2O). It contains 10 molecules of water of crystallisation.
(d) Gypsum is Calcium sulfate dihydrate (CaSO4.2H2O). It contains 2 molecules of water of crystallisation.
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