Biology lab #4 Diffusion and Osmosis

Biology lab #4 Diffusion and Osmosis - solute is higher...

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Benny Wong 10/13/09 Tuesday Biology Lab #4 Diffusion and Osmosis Purpose: In this lab, the mechanism of diffusion and osmosis were studied. A solution was defined as having solutes and solvents. Solvents are the dissolving agents, i.e. water, and solutes are the dissolved substances, i.e. salt. Diffusion is a physical process, in which molecules move from an area where there is a high concentration of solutes to one where there concentration is lower. In cells, osmosis is the diffusion of water through a selectively permeable membrane. This selectively permeable membrane allows water to freely pass through but regulates the movement of solutes. The three terms that were introduced in this lab were hypertonic, hypotonic, and isotonic. A hypertonic solution is the one whose concentration of
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Unformatted text preview: solute is higher than a solution it's compared with. A hypotonic solution is the one whose concentration of solute is lower than a solution it's compared with. An isotonic solution is the one whose concentration is the same as the comparing solution. Upon learning the different types of solutions, each group was given cells in different types of solutions and was told to observe the osmotic behavior in cells. Results: Significance: Based on the results of sucrose molarity affecting the weight and volume of potato tubers, the relationship between the two is inverse. As sucrose molarity increases, the weight and the volume of the tubers decrease in a negative fashion. This indicates that solute concentrations affect the amount of water taken up by the tubor pieces....
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Biology lab #4 Diffusion and Osmosis - solute is higher...

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