Dilution series

AIM - TO MAKE A DILUTION SERIES TO INVESTIGATE CONCENTRATION

METHOD - 1  Place the six test tubes in a test tube rack. Label the rack with number 1- 6.
                 
                     2  Using the measuring cylinder, fill the test tubes 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 tubes 2

                     6  Rinse the transfer pipette thoroughly to ensure that no purple solution remains

                     7  Gently shake the 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

our group added the solute ( potassium Permanganate ) into the solvent (water) we lightly shaked the test tube for a while, it slowly turned in to a dark purple colour we did the same thing again and again for the next 5 test tubes except using the first test tube as our "solute" it turned into a lighter purple because of the amount of water we added in the test tubes.