Science Experiment

In science this week we did a experiment with purple crystals (Potassium Permanganate) because in science we have been working on dilution and concentration. For this experiment we had 6 test tubes and we had to put different amounts of water into each test tube. We then had to put one small purple crystal (Potassium Permanganate) into the test tube with the most water. We then had to use a pipette to take some of the purple water and put it into the next test tube. We then had to do the same thing and every time that we took some and out it in the next it kept getting lighter and lighter to the point where the last one was so clear that you could barely see any purple.

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

Dilution: A dilute solution contains a small amount of solute. At home if you were making a cup of week coffee in scientific terms you would be making a dilute cup of coffee.

Concentrated: A concentrated solution contains a large amount of solute at home if you were to make a strong coffee in scientific terms you would be making a concentrated cup of coffee

Thank you for reading my blog post about this experiment. If you have any more questions about the experiment then feel free to ask.