Dilution Experiment
Aim: To make a dilution series to investigate concentration.
Equipment: A potassium permanganate crystal, six large test tubes, tweezers/spatula, a plastic transfer pipette, a test tube rack, 10ml measuring cylinder
What is Dilution?
Making something less concentrated. There will be fewer particles in the liquid.
What does Concentration mean?
A measurement of how much solute is in a solution.
What are some examples of diluting?
Hypothesis: The last tube (Test Tube 6) is going to be the most dilute - The 1st tube is going to be least dilute.
What did you do? - 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 5ml of water.
- Using your tweezers/spatula, add a single crystal or potassium pormanganate to test tube 1.
- Gently shake the test tube until the crystal has dissolved.
- Using the transfer pipette, carefully remove exactly 5ml from test tube 1 and pour it into test tube 2.
- Gently shake test tube 2 and repeat the transfer process, transferring exactly 5ml of solution from test tube 2 to test tube 3, test tube 3 to test tube 4 and so on.
Was your Hypothesis correct?
Yes. The last test tube was less concentrated and the first one was more concentrated.
No comments:
Post a Comment
Please structure your comments as follows:
Positive - Something done well
Thoughtful - A sentence to let us know you actually read/watched or listened to what they had to say
Helpful - Give some ideas for next time or Ask a question you want to know more about