Take a cupful of water in a beaker and add a few drops of dilute sulphuric acid. Heat the water. When it starts boiling,add copper sulphate powder slowly while stirring continuously. Continue adding till no more powder can be dissolved. Filter the solution. Allow it to cool. Look at the solution after sometime. You will see crystals of copper sulphate.
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take a cupful of water and add copper sulphate to it make it to dissolve and add sulpheric acid and mix it.don't disturb it and let it to evaporate and crystals of copper sulphate