Question

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

Answer 1

Precipitation reaction:

1. It is a reaction that occurs in an aqueous solution, where two ionic species react to form an insoluble precipitate is formed.
2. For example, in the reaction between sodium chloride and silver nitrate$\left({\mathrm{AgNO}}_3\right)$, a white ppt of silver chloride$\left(\mathrm{AgCl}\right)$ is formed.
3. The balanced reaction is:

$\underset{\mathrm{Silver}\mathrm{nitrate}}{{\mathrm{AgNO}}_3\left(\mathrm{aq}\right)}+\underset{\mathrm{Sodium}\mathrm{chloride}}{\mathrm{NaCl}\left(\mathrm{aq}\right)}\to \underset{\mathrm{Silver}\mathrm{chloride}}{\mathrm{AgCl}\left(\mathrm{s}\right)(\downarrow )}+\underset{\mathrm{Sodium}\mathrm{nitrate}}{{\mathrm{NaNO}}_3\left(\mathrm{aq}\right)}$

The reaction between Silver nitrate and Pottasium chloride:-

1. In this reaction between silver nitrate$\left({\mathrm{AgNO}}_3\right)$ and potassium chloride, the products formed are potassium$\left({\mathrm{KNO}}_3\right)$ nitrate and silver chloride$\left(\mathrm{AgCl}\right)$
2. This silver chloride formed an insoluble white ppt.
3. The balanced reaction is:

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

Therefore, an example of a reaction in which precipitate is formed is the reaction between silver nitrate$\left({\mathrm{AgNO}}_3\right)$ and potassium chloride, where a white ppt of silver chloride$\left(\mathrm{AgCl}\right)$ is formed:

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