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Question
A student extracted 3 g of pure, dry salt from 5 g of rock salt. The mass of salt obtained was less than the mass of rock salt because the rock was removed by:
A student extracted 3 g of pure, dry salt from 5 g of rock salt. The mass of salt obtained was less than the mass of rock salt because the rock was removed by:
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Solution
The correct option is B filtration
The mass of salt obtained by the student was less than the mass of rock salt as, some of the rock salt precipitated out as impurity on filtration as in filtration some solid residue is left behind and we obtain the desired product after filtration of the filtrate. In evaporation and distillation there is no loss of weight as all of the product is recovered with or without impurity.
The mass of salt obtained by the student was less than the mass of rock salt as, some of the rock salt precipitated out as impurity on filtration as in filtration some solid residue is left behind and we obtain the desired product after filtration of the filtrate. In evaporation and distillation there is no loss of weight as all of the product is recovered with or without impurity.
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