Question
To separate the components from the mixture of sand and salt.
✓
Answer
Apparatus - Materials : Mixture of sand and salt, beaker, water, kettle, metal dish.
Procedure:
$(1)$ Take a mixture of sand and salt in a beaker and add some water to it.
$(2)$ Leave the beaker aside for some time.
$(3)$ The sand settles down at the bottom of the beaker and salt will dissolve in water.
$(1)$ Take a mixture of sand and salt in a beaker and add some water to it.
$(2)$ Leave the beaker aside for some time.
$(3)$ The sand settles down at the bottom of the beaker and salt will dissolve in water.
$(4)$ Separate the sand by decantation or filtration. The decanted liquid contains salt and sand remains behind in the beaker.
$(5)$ Filter the decanted water using filter paper and funnel into a beaker.
$(6)$ In filtrate salt will be in solute form. Salt and water are to be separated from it.
$(7)$ Transfer this liquid to a kettle and close its lid.
$(8)$ Heat the kettle until the water turns into steam.
$(9)$ Take a metal plate with some ice in it.
$(10)$ Hold the plate just above the spout of the kettle. When the steam comes in contact with the metal plate containing ice, it condenses into water.
$(11)$ After all the water has evaporated, what is left behind in the kettle?
Observation:
$(1)$ Salt is left behind in the kettle.
$(2)$ Water droplets are formed below the plate containing ice.
Conclusion: A mixture of salt and sand can be separated by combining the processes of decantation, filtration, evaporation and condensation.
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