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

Explanation

In a precipitation reaction, one of the products formed during the reaction does not dissolve in solution and gets settled at the surface of the container (beaker or tube). It is known as a precipitate. For example.
`AgNO_(3) (aq) + NaCl (aq) to underset("(White ppt.)")(AgCl(s)) + NaNO_(3)(aq)`
`BaCl_(2)(aq) + Na_(2)SO_(4)(aq) to underset("(White ppt.)")(BaSO_(4)(s)) + 2NaCl(aq)`.