Describe how crystals of copper sulphate are prepared in points?

Question: Describe how crystals of copper sulphate are prepared in points?

To prepare crystals of copper sulfate, follow these steps:

1. Prepare the Solution:

   - Take a clean beaker (250 ml) and add the powdered sample of copper sulfate to it.

   - Add distilled water and stir well using a glass rod.

   - To make the solution clearer, add 2–3 drops of concentrated sulfuric acid and heat it up to 70°C.

   - Gradually add more impure copper sulfate until no more of it dissolves.

2. Filter and Collect Filtrate:

   - Filter the solution and collect the filtrate in a china dish.

   - Heat it over a wire gauze kept on a tripod, stirring continuously until the volume reduces to half.

   - Cool the other end of the glass rod by blowing air.

3. Crystallization:

   - When a thin crust forms on the surface, crystallization points are reached.

   - Turn off the burner and cover the china dish with a watch glass without disturbing it.

   - As the solution cools down, blue-colored copper sulfate crystals will separate out.

4. Final Steps:

   - Decant the mother liquor (the remaining liquid) and wash the crystals with a thin stream of cold water using a wash bottle.

   - Press the crystals between filter paper sheets to remove excess water.

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