Describe a method of separating common salt from a mixture of common salt and chalk powder.

Explanation

this mixture cntains two constituents : common salt and chalk powder ,Now , common salt is soluble in water ehereas chalk powder is insoluble in water ,SO ,this difference in their solubility will be used to separate them , this is done as follows :
(i) Some water is added to the mixture of common salt and chalk powder ,and stirred ,Common salt dissolves in water to from salt solution whereas chalk powder remains undissolved .
(ii) On filtering , chalk powder is obtained as a residue on the fiter paper and salt solution is obtanied as filtrate .
(iii) the salt solution (filtrate ) is evaporated to dryness when common salt is left behind.