Grade 7, Science Olympiad (CBSE) - Salts 

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Grade 7  |   Science  |   Salts, Acids, bases and salts, Olympiad, CBSE, ICSE, SOF, ITO


Salts are obtained from the neutralization reaction between acid and base. Some examples of salts are sodium chloride, limestone, Soda ash etc. 

Hydrated and anhydrous salts?

Some salts have water of crystallization loosely associated with them, and such salts are called hydrated salts. These hydrated salts on heating lose their water on crystallization and change to a powdery substance called anhydrous salt. 

Uses of salts

Salts have a special property by which they absorb moisture from the environment without getting dissolved in it, this property is called hygroscopic. 

Electronic items are kept dry from inside by putting a small cloth bag containing salt in it. 

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