Question

Identify the type of following reaction:

${\mathrm{AgNO}}_3+\mathrm{NaCl}\stackrel{}{\to }\mathrm{AgCl}+{\mathrm{NaNO}}_3$

Answer 1

Double displacement reaction:

• It is a chemical reaction in which two compounds in their aqueous solutions react to form two new compounds by the mutual exchange of their radicals.
• In a general double decomposition, the reaction can be represented as
• $\mathrm{AB}+\mathrm{CD}\to \mathrm{AD}+\mathrm{BC}$
• For example, when silver nitrate$\left({\mathrm{AgNO}}_3\right)$ reacts with sodium chloride$\left(\mathrm{NaCl}\right)$, they undergo a mutual exchange of their radicals resulting in the formation of silver chloride$\left(\mathrm{AgCl}\right)$ along with sodium nitrate$\left({\mathrm{NaNO}}_3\right)$.
• $\underset{\mathrm{silver}\mathrm{nitrate}}{{\mathrm{AgNO}}_3\left(\mathrm{aq}\right)}+\underset{\mathrm{sodium}\mathrm{chloride}}{\mathrm{NaCl}\left(\mathrm{aq}\right)}\to \underset{\mathrm{silver}\mathrm{chloride}}{\mathrm{AgCl}\left(\mathrm{s}\right)⇣}+\underset{\mathrm{sodium}\mathrm{nitrate}}{{\mathrm{NaNO}}_3\left(\mathrm{aq}\right)}$
• The above reaction is also a precipitate reaction and silver chloride$\left(\mathrm{AgCl}\right)$ is the precipitate