Question

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

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Hint:Precipitate is the insoluble solid which settles down after the completion of the chemical reaction. The formation of the precipitate can help in determining the presence of various types of ions or atoms. Solubility tables help determine the precipitation reaction.

-For example, $\text{AgN}{{\text{O}}_{3}}_{\left( \text{aq} \right)}\text{ + KC}{{\text{l}}_{\left( \text{aq} \right)}}\text{ }\to \text{ AgC}{{\text{l}}_{\left( \text{s} \right)}}\text{ + KN}{{\text{O}}_{3\left( \text{aq} \right)}}$
$\text{Ag}_{\left( \text{aq} \right)}^{+}\text{ + NO}_{\left( \text{aq} \right)}^{-}\text{ + K}_{\left( \text{aq} \right)}^{+}\text{ + Cl}_{\left( \text{aq} \right)}^{-}\text{ }\to \text{ AgC}{{\text{l}}_{\left( \text{aq} \right)}}\text{ + K}_{\left( \text{aq} \right)}^{+}\text{ + NO}_{\left( \text{aq} \right)}^{-}$