Q.15: What do you mean by a precipitation reaction? Explain by giving examples.
The reactions in which a precipitate is formed are called precipitation reactions. Examples:
1. Na2SO4 + BaCl2 —> BaSO4 + 2NaCl
In this reaction, BaSO4 is obtained as precipitate.
2. Na2CO3 + CaCl2 —> CaCO3 + 2NaCl
Here calcium carbonate is obtained as precipitate.
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