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Aim- To observe the process of crystallisation.

               Procedure-


                     Take 50 ml of distilled water in a 100 ml beaker.
                     Add 2-3 drops of sulphuric acid to it.
                     Heat it over a burner.
                     When it starts burning, add a small amount of copper sulphate powder to it.
                     Stir it continuously to dissolve.
                     Continue adding copper sulphate powder till no powder can be dissolved.
                     Carefully filter the solution.
                     Leave it undisturbed overnight.


               Observation-

                You will observe clean blue crystals of copper sulphate at the bottom of the beaker.

               Inference- Crystals of copper sulphate are formed by the process of crystallisation.

               Similarly we can prepare salt and sugar crystals.

                How salt is obtained from the sea?


               Sea water contains salt. Salt is obtained by the process of crystallisation.

               First sea water is collected in different shallow ponds. The water gets evaporated
               under the heat of sun and solid salt is left behind.

               Then refining of salt is done by the method of crystallisation.





































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