Aim: To separate colours by using the process of chromatography.
Definition: Chromatography is a method of separating out materials from a mixture.
Eg. blood, ink, drugs,
Scenario
A crime has been committed. The police have a signed cheque and a letter from the same crime scene but it seems like the handwriting is different. They have 3 suspects but not enough evidence. They need to know if the letter and the cheque were written by the same person.
How do they tell if the pens used for both of these pieces of evidence are the same?
Rainbow paper
Materials;
1. Water
2. Cup
3. Chromotagraphy paper
4. Felt pens
Process:
Step 1: Draw two dots on the paper
Step 2: Pour the water in the cup
Step 3: Put the paper in the cup
Step 4: Watch the colour change
Conclusion: What have I learnt from this experiment?
If you put felt on paper the colour of the water can change and the colour starts to go up.
Skittles
Aim: To separate colours from skittles by using the chromatography.
Materials;
1. 2. 3. 4. 5. 6.
Process:
Step 1:Step 2:Step 3:Step 4:Step 5:Step 6:Conclusion: What have I learnt from this experiment?