DILUTION EXPERIMENT

Aim:

To make a dilution series to investigate concentration.

Equipment:

Potassium permanganate crystals, 6 test tubes, test tube rack, tweezers, pipette, 10mL measuring cylinder

Method:

1. Place the test tubes in the rack. Label the rack with numbers 1-6.
2. Using the measuring cylinder, fill test tube 1 with 10 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 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.   Observations: Shade in the test tubes below to show the relative color of each dilution.                                                  

Results and discussion 

when we put the potassium permanganate crystal it turned dark purple and as we transferred to another test tube it turns lighter.

Conclusion: 

if you put the dark color in another tube, it turns darker than the other one. If you put water in the color it turns lighter.