Dilution - Science

Today in science we did an experiment on the topic Dilution, we had to first learn what dilution is another basic information about it. When doing the experiment we needed to know what was happening, a few things we picked up from previous lessons of science helped because we are able to describe what is happening. This covered what Solute, Solvent & Solution meant, including Dilution. 

Dilute : Making the solvent less concentrated(Weaker)

Solute : The substance being dissolved

Solvent : The liquid that does the dissolving

Solution : The mixture that forms as a result of combining together 

Concentration : A measure of how much solute has been dissolved into the solvent.

Aim : TO MAKE A DILUTION SERIES TO INVESTIGATE CONCENTRATION

Hypothesis: I think that every time we transfer the concentrated liquid to a clear water it will be diluted meaning less concentrated and transferring that to another clear water will make it even more diluted as the one before.

Equipment :

- Potassium Permanganate

- Test Tubes (x6)

- Test Tube Rack

- Measuring Cylinder

- Pipette 

Method:

• Place the six test tubes in a test tube rack. Label the rack with numbers 1 - 6.
• Using the measuring cylinder, fill test tube 1 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 1.
• Gently shake the test tube until the crystal has dissolved.
• Using the transfer pipette, carefully remove exactly 5 mL from test tube 1 and pour it into test tube 2.
• Rinse the transfer pipette thoroughly to ensure that no purple solution remains.
• Gently shake test tube 2 and repeat the transfer process, transferring exactly 5 mL of solution from test tube 2 to test tube 3.
• Rinse the pipette again and repeat the transfer process for test tubes 4, 5 and 6.

Review:

Once the results came in we have already noticed that the test tube 1 has a visible colour meaning it isn't diluted yet also meaning that it is highly concentrated with the potassium permanganate particles in the liquid. As we transferred the solution from one test tube to another it became less concentrated, this means that there are less particles also can be told by its colour changing. In my opinion as I said before making the solution transfer to a clear water made the potassium permanganate less concentrated since there was more liquid. It is now very clear that the first test tube is the least diluted meaning it has high concentration and the least concentrated will be the last one which barely has any colour or potassium permanganate in it.