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Question
The number of molecules of water of crystallisation present in washing soda crystals is ______.
Options
five
two
ten
seven
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Solution
The number of molecules of water of crystallisation present in washing soda crystals is ten.
Explanation:
The chemical formula of washing soda is Na2CO3.10H2O. The water molecules that form part of a salt’s structure are called its water of crystallisation. Hence, the number of water molecules of crystallisation present in washing soda crystals is 10.
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