Recrystallisation procedure and requirements

Recrystallisation

Introduction: Recrystallisation is a simple procedure in which we can separate a water soluble pure compound from insoluble impurities

Requirements 

1. Porcelain bowl
2. Bunsen burner
3. Wire gauze
4. Water soluble salt 
5. Water  insoluble impurities
6. Weighing balance
7. Stirrer
8. Filter Paper
9. Funnel
10. Conical flask

Procedure

1. Take a fixed mass of pure water soluble compound in the porcelain dish
2. Add a fixed mass of insoluble impurity
3. Mix thoroughly
4. Add water
5. Stir properly to make sure all the soluble salt dissolves
6. Next, heat the porcelain dish over a bunsen burner taking care to put a wire gauze between the dish and the flame
7. When the mixture starts boiling pour it through the filter paper (which has to be placed in the funnel) into the conical flask
8. If you still see traces of the impurity repeat step  6 and 7
9. Keep doing so until you get a clear filtrate 
10. Next cool the solution until crystals form
11. Collect the crystals and weigh them 
12. Compare it to the original mass