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Questions
What do you understand by precipitation reaction? Explain with examples.
What do you understand by the term precipitation?
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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)
\[\ce{AgNO3(aq) + NaCl(aq) -> AgCl(s) ↓ + NaNO3(aq)}\]
The precipitate forms because the solid (AgCl) is insoluble in water.
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