Colier inside zip Colored outside zip Volume of Volume of
before after marker (before) mrker (after)
Explain why the differences in time for coffee and food coloring to make the whole glass colored. Was diffusion, osmosis or both observed in this experiment?
1. Pour half a cup of balsamic vinegar (dark) and halfa cup of water inside a glass.
2. Mix the contents well with a whisker.
3. Record what you see.
4. Add half a cup vegetable cooking oil.
5. Mix the contents well with a whisker.
6. Record what you see.
7. Using a teaspoon of your dish detergent. Mix the contents well with a whisker.
8. Record what you see.
1. Results: In each empty box, record what you see after you have added that reagent.
Water + Balsamic Vegetable Detergent
vinegar
2. What was the purpose of adding the detergent?
Post-lab questions
1. Define polarity.
2. A membrane that allows certain molecules to pass through but not others is known as what kind of a membrane?
3. You have a membrane that is permeable to potassium ions and water. The membrane is not permeable to sodium ions. The concentrations are listed below for each molecule on either side of the membrane. Explain the net movement for EACH molecule.
Molecule Outside of the Membrane Inside of the Mehrane
Palaniam lens