Question

how can we obtain pure copper sulphate from an impure sample?​

Answer 1

Pure copper sulphate can be obtained from an impure sample by re-crystallization. The impure sample is dissolved in water, heated and then cooled which then later forms crystals. These copper sulphate crystals are then separated by filtration and drying.

Crystallization is the method of choice for obtaining pure Copper sulphate from an impure sample. In this process the sample is dissolved in minimum amount of water and impurities are filtered out. Then the water is evaporated and pure sample is obtained.

Answer 2

Answer:

by the method of crystalisation