Concentration - Science Experiment

Aim: To make a dilution series to investigate concentration

Equipment: A potassium permanganate crystal, six large test tubes, tweezers, a plastic transfer pipette, a test tube rack, 10

,l measuring cylinder.

Method:
1. Place the six test tubes in a test tube rack. Label the rack with numbers 1-6.
2. Using the measuring cylinder, fill test tube 1 with 10 ML of water. Fill the remaining test tubes with 5 ML of water.
3. Using your tweezers, add a single crystal of potassium permanganate to test tube 1.
4. gently shake the test tube until the Crystal has dissolved
5.Using the transfer pipette. carefully remove exact,y 4 ML from test tube 1 and pour it into test tube 2
6. Rinse the transfer pipette thoroughly to ensure that no purple solution remains.
7. gently shake test tube 2 and repeat the transfer process, transferring exactly 5 ml of solution from test tube 2 to test tube 3
8. Rinse the pipette again and repeat the transfer process for test tubes 4, 5 and 6

I unfortunately couldn't get a picture of our personnel results. The test tubes filled at the back were mostly purple the shade getting lighter every time we transfer a bit. It looked pretty cool. Here is a imagine from a website that looks like our result.

Links to the images I used: Bottom one, Top one.