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Separation of Substances — Science STD 6 — Question

Gujarat BoardEnglish MediumSTD 6ScienceSeparation of Substances5 Marks
Question
Describe the following  experiment with Diagram : To obtain salt from salt solution by using the method of evaporation.
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Answer

Apparatus — Materials : Beaker, water, salt, tripod, wire gauze, Bunsen burner.  Procedure:
$(1)$ Take some water in a beaker and heat it. Bring the water to a boil and keep on heating it till the water turns into steam and disappears completely.
$(2)$ See that when all the water evaporates nothing is left behind in the beaker.
$(3)$ Add two spoons of salt to water in another beaker and stir it well. The salt solution appears clear.
$(4)$ Heat the beaker containing the salt water and let the water boil away.
$(5)$ Observe what is left in the beaker. Observation : A white coloured component is left in the beaker. This white component is salt. Conclusion: Salt can be obtained from a salt solution by the process of evaporation.

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