15. What do you mean by a precipitation reaction? Explain by giving examples.
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Precipitation reaction is a reaction in which an insoluble compound is formed.mostly all double decomposing reaction are precipitation reaction. Example:Bacl2+Naso4—>Baso4 (precipitate)+Nacl
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Answer:
Reaction in which insoluble substance is formed is called precipitation reaction.
Eg --->
- BaCl2 + Na2SO4 ----> 2NaCl + BaSO4. Here BaSO4 white insoluble substance is formed.
- Pb(NO3)2+ 2Kl -----> PbI2 + 2KNO3 .Here PbI2 yellow insoluble substance is formed.
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