Question

Which solution makes the white precipitate of silver chloride soluble in it?

Answer 1

Chemical reaction

• A chemical reaction is a process by which one chemical substance changes into another chemical substance.
• A chemical reaction results in a chemical change because a new substance is created that has entirely different characteristics from the original one.
• For example, rusting of iron, the curdling of milk, the digestion of food, respiration, etc.

Silver chloride solubility

• Ammonium hydroxide can dissolve the white precipitate of silver chloride.
• When aqueous ammonia $\left({\mathrm{NH}}_3\right)$ is added, the silver chloride $\left(\mathrm{AgCl}\right)$ precipitate dissolves in favor of the formation of the silver ammonia, Diamine silver chloride $\left(\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]\mathrm{Cl}\right)$, which is a colorless solution.
• The reaction is as follows:

$\underset{\left(\mathrm{Silver}\mathrm{chloride}\right)}{\mathrm{AgCl}\left(\mathrm{s}\right)}+\underset{\left(\mathrm{Ammonia}\right)}{{\mathrm{NH}}_3\left(\mathrm{aq}\right)}\to \underset{\left(\mathrm{Diamine}\mathrm{silver}\mathrm{chloride}\right)}{\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]\mathrm{Cl}\left(\mathrm{aq}\right)}$