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

Nature of Science from akshatsing9

Group 4 project

Recently, in school we had our Group 4 project. The project combines all the subjects of the group 4 of the IB diploma. You perform the project along with your peers who have taken different group 4 subjects. It is a required part of the IB Diploma.

So, initially you will be given an overarching topic to do the project on. In our school the overarching topic was "water". This is quite a relevant and interesting topic considering the crisis of water shortage. Hence, it is quite easy to take international mindedness into consideration while performing a project on this topic. Then you have to choose a topic under this broad topic. For example, my group decided to do "water in an industry".

The next step in the Group 4 project is to decide which experiments to perform in each subject. Each experiment must be linked to your topic and have some real world significance. Also, every member of the group should  be familiar with each experiment in every science. This means a Biology student should have thorough knowledge and an Environmental Studies student should be able to answer any question about the Chemistry experiment. The beauty of the Group 4 project is that you end up learning a bit about each and every science. In fact, our school had a session in which we learnt basic experimental skills in each science and I recommend any teacher reading this to do the same for his/her student as I found this very useful in integrating all the sciences.

At the end of the Group 4, you will need to write a reflective statement which is digitally sent to the IB. It is only 50 words and you should sum up your experience. Here is a sample reflective statement:

"The topic for our group 4 this year was water and my group’s topic was water in an industry. The group 4 project was an amazing experience and I learnt a lot about Physics, Chemistry, Biology and ESS."

P.S. For this project, I performed recrystallisation and in my next post, I will include the procedure and pictures for a recrystallisation experiment.