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Thursday, June 11, 2020

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
           


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