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2012-05-10

Epsom Salt (Short Note) | Inter – Class Chemistry Notes


Epsom Salt (Short Note)

Definition
The hepta hydrate from of magnesium sulphate is known as Epsom Salt.

Molecular Formula
The molecular formula of Epsom Salt is
MgSO4. 7H2O

Occurrence
Magnesium sulphate occurs in nature as Kleserite (MgSO4.H2O)

Preparation of Epsom Salt
Magnesium sulphate is prepared by the reaction of sulphuric acids on Magnesium metal, its oxide, hydroxide or carbonate.
Mg + H2SO4 —-> MgSO4 + H2
MgO + H2SO4 —-> MgSO4 + H2O
Mg(OH)2 + H2SO4 —-> MgSO4 + 2H2O
Mg(OH)2 + H2SO4 —-> MgSO4 + 2H2O
MgCO3 + H2SO4 —-> MgSO4 + H2O + CO2

Properties of Epsom Salt
1. It is soluble in water
2. Crystalline Epsom loses water on heating forming anhydrous magnesium sulphate.

Use of Epsom Salt
Epsom salt is used as a mild purgative.

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