Describe how to prepare a pure sample of çalcium chloride in the laboratory

Answer 1

To prepare a pure sample of calcium chloride in the laboratory, follow these steps:

1. Weigh out the required amount of Calcium carbonate and place it in a beaker.
2. Gradually add hydrochloric acid to Calcium carbonate, stirring constantly until the reaction is complete.
3. Filter the resulting mixture using a filter paper to separate off any unreacted Calcium carbonate.
4. Heat the mixture obtained on a hotplate to evaporate the water in the mixture.
5. Once all the water has been evaporated, you will be left with Calcium chloride crystals. These crystals can be dried further by leaving them in an oven at a low temperature or under a heat lamp.

Your pure sample of Calcium chloride is ready for use. Store it in an airtight container until needed.