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Water of Crystallization

Epsom salt ha...

Question

Epsom salt has _______ molecules of water of crystallization.

A

two

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B

three

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C

seven

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D

five

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Solution

The correct option is C seven
Epsom salt is a magnesium sulphate hydrate. Molecular formula of epsom is $M g S O_{4} .7 H_{2} O$ . Water of crystallization is the total number of water molecules present in one molecule of salt. So, epsom contains seven molecules of water of crystallization.

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Similar questions

Q. Water of crystallization is the fixed number of water molecules chemically attached to a unit of a salt in its crystalline form.

Q. How many water molecules are present in one molecule of Epsom salt?

Q. Name the following
Name a crystalline salt which does not contain water of crystallization.

Q. Copper sulphate crystals which seem to be dry contain water of crystallization. When we heat the crystals, this water is removed and the salt turns white. If you moisten the crystals again with water, you will find that blue colour of the crystals reappears.

The water of crystallization is the fixed number of water molecules present in one formula unit of a salt. Five water molecules are present in one formula unit of copper sulphate. The chemical formula for hydrated copper sulphate is

C u {S O}_{4}

5 H_{2} O

. Now you would be able to answer the question whether the molecule of

{N a}_{2} {C O}_{3}

10 H_{2} O

is wet. One other salt, which possesses water of crystallization is gypsum. It has two water molecules as a water of crystallization. It has the formula

C a {S O}_{4}

2 H_{2} O

What are the uses of this salt?

Q. What are the water molecules attached to Epsom salt called?

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