Question

State your observation, when calcium hydroxide is heated with ammonium chloride crystals.

Answer 1

• When calcium hydroxide is heated with ammonium chloride crystals, ammonia gas is released along with water and calcium chloride.

Chemical equation:

$\underset{\mathrm{Calcium}\mathrm{hydroxide}}{\mathrm{Ca}{\left(\mathrm{OH}\right)}_2\left(\mathrm{aq}\right)}+\underset{\mathrm{Ammonium}\mathrm{chloride}}{2{\mathrm{NH}}_4\mathrm{Cl}\left(\mathrm{s}\right)}\to \underset{\mathrm{Calcium}\mathrm{chloride}}{{\mathrm{CaCl}}_2\left(\mathrm{aq}\right)}+\underset{\mathrm{Ammonia}}{2{\mathrm{NH}}_3\left(\mathrm{g}\right)}+\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}$

Therefore, when calcium hydroxide is heated with ammonium chloride crystals, pungent-smelling ammonia gas is obtained.