Potassium Permanganate Crystal

In science this week we have been working on dilution and concentration.  We were diluting the water along along a path of six test tubes and boiling tubes next to each other. We started off but putting a Potassium Permanganate Crystal into the first test tube with 10mLs of water and then we used a pipette and then we got about 5mLs of water from the first test tube and put it into the next test tube with 5mLs of clear water and we saw how much it diluted as we got further and further down the chain.  We figured out that the further down the chain the water got the more diluted it became, and by the time it was at the sixth dilution there was a tiny bit of the Potassium Permanganate Crystal shards left in the water but there was very minimal colour in the water. 

Method: 

• Place the six test tubes in a tube rack. Label the rack with numbers 1-6
• Using the measuring cylinder, fill the test tube one with 10 mL of water. Fill the remaining test tubes with 5 mL of water
• Using your tweezers, add a single crystal of Potassium Permanganate to test tube one
• Gently shake the test tube until the crystal has dissolved
• Using the transfer pipette, carefully remove exactly 5 mLs of water from test tube one and pour it into test tube two
• Rinse the transfer pipette thoroughly to ensure that no purple solution remains 
• Gently shake test tube two and repeat the transfer process, transferring exactly 5mL of solution from test tube two and put it into test tube three
• Rinse the pipette again and repeat the transfer process for the tubes 4,5,6. 

Dilution definition: A dilute solution contains a small amount of solute. At home, if you were to make a 'weak' coffee, in scientific terms you are making a dilute solution of coffee. This means that there is a little amount of solute in your liquid you are mixing it with

Concentration definition: A concentrated solution contains a large amount of solute. At home if you make a 'Strong' coffee, in scientific terms you are making a concentrated solution of coffee. This means there is a large amount of solute in the liquid you are mixing it with. 

Thank you for reading my blog post. is there anything else you would like to know about the experiment?