Question

h the help of labelled diagram describe an activity to separate a mixture containing ammonium
chloride, sodium chloride and sand.

Answer 1

The mixture of sodium chloride (NaCl), ammonium chloride (NH4Cl) and sand can be easily separated with the help of the following three processes stepwise

1) Sublimation

2) Decantation and Filtration

3) Evaporation

First, take the mixture in a china dish. Place this china dish on a tripod stand and cover the dish by inverting a funnel over it. The funnel should be plugged on the top with cotton to prevent the vapours of ammonium chloride from escaping into the atmosphere. Heat the china dish using a burner. On heating, ammonium chloride sublimes. As a result, ammonium chloride gets separated from common salt and solidifies on the cold walls of the funnel.Collect the residue left in the china dish. It consists of sand and sodium chloride. Dissolve this mixture in water. Salt, being soluble will dissolve in water. Sand on the other hand, will settle at the bottom of the solution. Salt solution can be separated from sand by decantation and filtration. Next, we are left only with salt solution. Salt can be separated from this solution by simple evaporation.

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Answer 2

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