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What do you mean by a precipitation reaction? Explain by giving examples.

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A reaction in which an insoluble solid (called precipitate) is formed is called a precipitation reaction.

Na2CO3 (aq) + CaCl2 (aq) → CaCO3 (s) + 2NaCl (aq)
Sodium Carbonate + Calcium Chloride → Calcium Carbonate + Sodium Chloride
In this reaction, calcium carbonate is obtained as a precipitate. Hence, it is a precipitation reaction.

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