Question

Name the following:

(c) A salt that is prepared by precipitation.

Answer 1

Precipitation Reaction

• This reaction involves the existence of a precipitate that can be easily separated with the help of filtration.
• Barium sulfate $\left({\mathrm{BaSO}}_4\right)$ is prepared by precipitation.

Chemical reaction:

• Barium chloride $\left({\mathrm{BaCl}}_2\right)$ undergoes a chemical reaction with sulfuric acid $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$. This will result in the formation of barium sulfate $\left({\mathrm{BaSO}}_4\right)$ along with hydrochloric acid$\left(\mathrm{HCl}\right)$.
• The chemical reaction is as follows:

${\mathrm{BaCl}}_2\left(\mathrm{s}\right)+{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\to {\mathrm{BaSO}}_4\downarrow +2\mathrm{HCl}\left(\mathrm{aq}\right)$