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Crystals of Salts

The number of...

Question

The number of molecules of water of crystallisation present in washing soda crystals is :

(a) five

(b) two

(c) ten

(d) seven

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Solution

Washing soda has formula $N a_{2} C O_{3} .10 H_{2} O$ . Hence, it has 10 molecules of water of crystallization.

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