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Diffusion and Osmosis: Investigating the Processes of Diffusion and Osmosis in a Model Membrane System and the Effect of Solute Concentration on Water Potential as it Relates to Living Plant Tissues
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Diffusion and Osmosis: Investigating the Processes of Diffusion and Osmosis in a Model Membrane System and the Effect of Solute Concentration on Water Potential as it Relates to Living Plant Tissues Mike Karp Partner: Elizabeth Moran Mead AP BIO 10/24/04 Abstract The purpose of this experiment was to understand the principles of diffusion, osmosis, and water potential. In the first section of this lab, we measured the diffusion of small molecules through dialysis tubing, an example of a selectively permeable membrane. The dialysis tubes were filled with 15% glucose and 1% starch. They were placed into a beaker with H2O and IKI. We analyzed the diffusion of glucose by recording color and presence of glucose in both the bag and the beaker. Next, we studied osmosis by investigating the relationship between solute concentration and the movement of water through a selectively permeable membrane. We were able to do this by filling dialysis tubes with distilled water...
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