Copper sulfate can be purified using crystallization or the sulfate precipitation method:
Crystallization
This method involves the following steps:
Dissolve the impure copper sulfate in a minimum amount of water in a beaker
Filter out any impurities and collect the solution in a china dish
Evaporate excess water to create a saturated copper sulfate solution
Cover the china dish with filter paper and let it cool slowly to room temperature
Crystals of pure copper sulfate will form in the china dish
Sulfate precipitation method
This method uses ethanol to selectively precipitate copper sulfate, leaving impurities in the solution. The precipitated copper sulfate can then be purified through repea...