Dilution Experiment

On Monday we did the dilution experiment with groups, Im with Hassanin and Paea, While my group doing the experiment I was taking a photo, 1 of our science teacher take us photo after we did the experiment.

Aim: To make a dilution series to investigate the concentration.

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

Method: 1. Place the six test tubes in a test tube rack. Label the rack with number 1-6.

2. Using the measuring cylinder, fill test tube 1 with 10 ml of water, Fill the remaining test tube 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 exactly 5 ml from test tube 1 and pour it into the test tube 2.

6.   Rinse the transfer pipette thoroughly to ensure that no purple solution remains.

7. Gently shake the 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 tube 4, 5 and 6.

Result:

Conclusion/discussion:

When I and my group did that we can see that the colour is getting to get clear so there is 6 large six tubes and the first tubes is not clear colour it's very dark and the last one is very clear so we can see the colouring is getting clear and dark.

What did you see and why: I see the 6 tubes are getting the same colour and getting dark and clear and it's working good and the colouring is working and changing it to the other tubes we get 5 ml in the first tubes and then put it on the next tubes and then get another 5 ml and put it on other tubes until in the last tubes.