Question

How to separate ammonium chloride and sodium chloride?

Answer 1

The Procedure:

Preparing the mixture of ammonium chloride, sand and common salt:

Take a small quantity of a mixture of sand, common salt and ammonium chloride in a china dish.

Separation of Ammonium Chloride:

Real Lab Procedure:

Place the china dish on a wire gauze that is placed over a tripod stand.

Cover the china dish with an inverted glass funnel and plug in a little cotton at the opening of the stem of the funnel.

On heating the mixture in the china dish, white fumes evolve and rise inside the funnel.

Stop heating when the white fumes stop rising and allow the funnel to cool.

After cooling, remove the funnel from the china dish and using a spatula, transfer the solid ammonium chloride sticking on the walls of the funnel into a watch glass.

Inference:

Ammonium chloride sublime and can be separated from the mixture of salt and sand by the process of sublimation.

Answer 2

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When Ammonium Chloride(NH4Cl) is heated at high temperature, it sublimes and gives rise to white colored dense fumes. Later, these fumes condense to form a powdered white substance on the cool areas of the test tube. But, Sodium Chloride(NaCl) does not give rise to any white colored fumes upon heating.

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