Dilution Experiment

Dilution Experiment

On Monday for chemistry we did an experiment learning how to use serial dilution (Repetitive Dilution) to learn about how concentration gets weaker.

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 mL 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 exactly 5 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.

Results