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Friday, 8 March 2019

Making A Dilution Series

Aim: To make a dilution series to investigate the concentration

Equipment: A potassium permanganate crystal, six large test tubes, tweezers, a plastic transfer pipette, a test tube rack, 10ml measuring cylinder

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 10 ml 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 1
4. Gently shake the test tube until the crystal has dissolved
5. Using the transfer pipette, carefully remove exactly 5ml from the test tube 1 and pour in into test tube 2
6. Rinse the transfer pipette again and repeat the transfer process for test tube 4, 5 and 6

Results: 
-The color goes lighter 

Solute: The Solid/ Potassium Permanganate
Solvent: The Liquid/ Water 
Solution: The Two Things Added Together 
Soluble: The Substances Cant Dissolve
Concentrated: More Solid Than Liquid

Discussion-
The Solute turned into liquid when we were mixing the solution together.


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