Answer the following question:
 
State the steps involved in the preparation of limewater.
Answer variants:
Blue crystals of copper sulphate begin to form as the solution cools.
Heat the filtrate to obtain a hot saturated solution.
Separate the crystals by filtration, dry them using filter paper, and collect pure blue crystals.
Heat the solution to boiling until all the water evaporates completely.
Add a large amount of water to the impure copper sulphate so that it completely dissolves immediately.
Cover the beaker and allow it to cool slowly without disturbance.
Filter the hot solution to remove insoluble impurities.
Take impure copper sulphate (\(CuSO_4\)) in a beaker, add a small amount of water, and heat gently to dissolve it.
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