experiment is set up tested weather three different molecules (water, iodine, and starch) can diffuse across the semi permeable dialysis tubing. Below is a picture of your set up. For the hundred percent start situation label to picture with the initial locations of the iodine starch in tapwater? Draw arrows to identify which substances move during the experiment in which direction?
Added by Joseph M.
Step 1
Step 1: Set up the experiment by obtaining three pieces of semi-permeable dialysis tubing and tying off one end of each tube. Show more…
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Dr. J has set up three different diffusion experiments like the ones in Lab 5. A dialysis bag is filled with a liquid, then submerged in a beaker filled with liquid. After one hour the dialysis bags were weighed on a balance and an indicator test was performed on the beaker liquid. Fill in the table below with the expected results of the experiment:
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At the start of the experiment, which side of the U tube is hypotonic, and which is hypertonic? Explain 90% Water 90% Water 10% Starch 10% Starch 3. 1 2 Study the diagrams of the beakers (1 & 2) to the right, noting the concentrations of various substances in the beakers and in the dialysis bags. Water molecules can pass through the dialysis bag, but starch cannot pass through. a. In which direction will water move in setup #1? Why? 100% Water 80% Water 20% Starch b. Which of the beakers contains a solution that is hypertonic relative to the bag's contents? c. In which direction will water move in setup #2?
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In Lab Exercise 3, you will set up cells using dialysis tubing. State your hypothesis regarding the movement of each of the molecules. Explain your hypothesis using your knowledge of osmosis. Iodine: Starch: Glucose:
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