XII Chemistry BIEK Topic - Epsom Salt (Short Note)

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




Occurance
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.