Science

AIm: To make a dilution series to investigate concentration.
Method: Place the six test tubes in a test tube rack. Label the rack with numbers with 1-6 .
1.Using the measuring cylinder, fill the remaining test tube 1 with 10 ml of water. Fill the remaining test tube with 5 ml of water.
Using your tweezers, add a single crystal of potassium permanganate to test tube 1.
Gently shake the test tube until the test tube dissolve.
Using the transfer pipette, carefully remove exactly 5 ml from test tube 1 and pour it into test tube 2.
Rinse the transfer pipette again and repeat the transfer process, transferring exactly 5 ml of the solution from test tube 2 to test tube 3.
Rinse the pipette again and repeat the transfer process, for test tube 4,5 and 6.

Results: Each time we transferred the liquid to the other test tubes the colour gets lighter.

Dissolution: Solute is the crystals (potassium permanganate) we put in water to make it change colour. Solvent is the water (liquid) we used. Solution is when the solute and solvent  are mixed together. Dilute is when you add more water and make it more lighter. Concentrated is when there's not that much water and the solution is strong.