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Diffusion and Osmosis

Diffusion and Osmosis. Point of the experiment. Understand difference of osmosis/diffusion Know basic principles of molecule movement. Exercise 1- diffusion. Task- determine relative size of the various molecules Fill dialysis bag with sugar/starch Put into a dilute iodine solution.

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Diffusion and Osmosis

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  1. Diffusion and Osmosis

  2. Point of the experiment • Understand difference of osmosis/diffusion • Know basic principles of molecule movement

  3. Exercise 1- diffusion • Task- determine relative size of the various molecules • Fill dialysis bag with sugar/starch • Put into a dilute iodine solution

  4. Exercise 2- Osmosis • Task- investigate relationship between solute concentration and water movement • Fill 6 different dialysis bags of sucrose • Place bags into distilled water • Compare weight

  5. Exercise 3-Water Potential of Potato Cores • Put potato core into substances with varying sucrose concentrations • Depending on movement of water, gain and loss of weight

  6. Exercise 4 and 5- Water Potential & Plasmolysis Exercise 4- calculate water potential for the potato Exercise 5- put an onion slice into water

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