Question

describe how crystals of copper sulphate are prepared

Answer 1

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1. Take a clean beaker (250 ml) and put the powdered sample of copper sulphate in it.

2. Make the solution more clearly by adding 2 – 3 drops of concentrated sulphuric acid in it and heat up 70° C then add more impure copper sulphate until no more of it dissolves."

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Answer 2

➢ Take some impure copper sulphate in a china dish and dissolve in minimum amount of water.

➢ Filter the solution to remove impurities.

➢ Heat the copper sulphate solution on water bath.

➢ When small crystals form on glass rods, stop heating.

➢ Allow the saturated solution to cool slowly.

➢ Crystals of pure copper sulphate are formed.

➢ Separate the copper sulphate crystals by filtration and dry.