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What Do You Understand by Precipitation Reaction Explain with Example - Chemistry

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Question

What do you understand by precipitation reaction? Explain with examples.

Short Note

Solution

Precipitation reactions occur when cations and anions in aqueous solution combine to form an insoluble ionic solid called a precipitate.  A precipitate is a solid that forms out of solution. 

A common example is that of the mixing of two clear solutions: Silver nitrate (AgNO3) and sodium chloride (NaCl)
\[\ce{AgNO3(aq) + NaCI(aq) -> AgCI(s) ↓ + NaNO3(aq)}\]
The precipitate forms because the solid (AgCl) is insoluble in water. 
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Chapter 2: Chemical Changes and Reactions - Exercise 2 (B) [Page 29]

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Selina Concise Chemistry [English] Class 9 ICSE
Chapter 2 Chemical Changes and Reactions
Exercise 2 (B) | Q 7 | Page 29

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