Question

With the help of an activity explain the process of deposition in ammonium chloride?

Answer 1

{ EXPERIMENT }

AIM:-

To separate the components of a mixture of sand, common salt and ammonium chloride (or camphor) by sublimation.

MATERIALS REQUIRED:-

Sand, common salt (NaCl), ammonium chloride (NH4Cl) or camphor, filter paper, funnel, china dish, tripod stand, wire gauze, beaker, glass rod, burner, cotton plug.

PROCEDURE:-

A. Steps for separation of ammonium chloride:-

Take the mixture of sand, ammonium chloride and common salt in a china dish and cover it with an inverted funnel.

Plug the end of stero funnel with cotton.

Place the china dish over a tripod stand and heat it gently.

Observe the changes. It is observed that ammonium chloride undergoes sublimation, i.e. vapours of NH4C1 are formed which get condensed on the cooler sides of the funnel.

Scrap the condensed ammonium chloride from the inner walls of the funnel (see figure). The non-sublimed mixture contains sand and common salt which remain behind in the china dish.

B. Steps for separation of Sand:

To the non-sublimate mixture add water.

Stir the mixture with a clean glass rod.

Filter the solution as shown in figure. Common salt solution is obtained as the filtrate, whereas sand is obtained as the residue on the filter paper.

C. Steps for separation of common salt (sodium chloride) :-

Take the filterate in a china dish.

Evaporate the filtrate to dryness, where water evaporates leaving behind sodium chloride (common salt) in the china dish (see figure).

RESULT:-

Sand, common salt and ammonium chloride mixture is separated by sublimation, Alteration and ‘ evaporation.

PRECAUTIONS:-

Heat ammonium chloride carefully as it is volatile.

Fix a cotton plug at the end of the funnel so that vapours of ammonium chloride do not escape.

Moisten the filter paper before filtering.

Wash your hands with soap after completing the experiment.

referring to above attachments for better knowledge..

hope it helps :)

Answer 2

Evaporate the filtrate to dryness, where water evaporates leaving behind sodium chloride (common salt) in the china dish (see figure). Sand, common salt and ammonium chloride mixture is separated by sublimation, Alteration and ‘ evaporation. Heat ammonium chloride carefully as it is volatile.