Q
Which of the following salts does NOT contain water of crystallisation?
JE CBT-1, 2-Jun-19 S-1
2019
✓ Answer:
A
Baking soda
Baking soda, which is sodium bicarbonate, does not have any water of crystallisation. In contrast, washing soda, known as sodium carbonate decahydrate, contains ten molecules of water of crystallisation. Blue vitriol, or copper sulfate pentahydrate, contains five molecules of water of crystallisation. Gypsum, which is calcium sulfate dihydrate, has two molecules of water of crystallisation.