Question

describe an activity how can we separate a salt and ammonium 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.

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Answer 2

Look for a physical (or chemical) different property..

In this case they are both water soluble ( so won't work)

but on heating,salt doesn't move but ammonium chloride can sublimate,aka change on heating from solid into vapour ( and back ) without passing through liquid phase .

So, lay the mixture on heat resistant plate, put a glass funnel over it with opening down . Start heating ammonium chloride become vapour and cools down inside of the funnel, you can collect it there with a spatula , the salt stay on the plate.

Hope this will help u.
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