Question

(a) Some sodium chloride was found to be contaminated with Copper (ii) oxide. Describe

how a sample of sodium chloride can be separated from the mixture.
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Answer 1

Step-by-step explanation:

As this oxide is insoluble in water you would dissolved the sample of sodium chloride in water and filter off the oxide.

Then concentrate the liquid by boiling and cooling, to get crystals of pure sodium chloride.

Answer 2

A mixture of sodium chloride and sand in water can be separated by the process of filtration and then by the process of distillation.