Question

Give an example of a reaction in which a precipitate is formed.

Answer 1

• A precipitation reaction is a reaction in which a precipitate is formed when two solutions containing soluble salts are combined.
• Example for precipitation:

$\underset{\mathrm{Silver}\mathrm{nitrate}}{{\mathrm{AgNO}}_3\left(\mathrm{aq}\right)}+\underset{\mathrm{Potassium}\mathrm{chloride}}{\mathrm{KCl}\left(\mathrm{aq}\right)}\underset{\mathrm{Silver}\mathrm{chloride}}{\to \mathrm{AgCl}\left(\mathrm{s}\right)+}\underset{\mathrm{Potassium}\mathrm{nitrate}}{{\mathrm{KNO}}_3\left(\mathrm{aq}\right)}$

• In this reaction, a solution of silver nitrate reacts with a solution of potassium chloride to form a solution of potassium nitrate and solid silver chloride is precipitated that settles down at the bottom.