Discussion for Osmosis Lab - H2O is very permiable this...

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Andria Fisanich Professor Patrie Jonathan Boice MTWF 9-10 Discussion for Osmosis Lab Osmosis Can be defined as the movement of water particles from a higher concentration to a lower concentration, therefore depending on the active particles in the inner and outter fluids of the substance allows molocules to move across the membrane. In our expieriment this proved to be true because when the intercellular fluids were hyper-osmotic and the extracellular fluids were hypo-osmotic we saw an increase in weight in the egg. This is an example of diffusion because we are moving from a higher to a lower concentration. On the contrary when the intercellular fluids were hypo-osmotic and the extracellular fluids were hyper-osmotic we saw a decrease in the weight of the egg. When we place the egg in a solution of the same concentration we found that the weight of the egg remained stable, this is called iso-osmotic . the membrane of the egg is semi-permiable which means it allows certain substances to pass through, but it’s very selective.
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Unformatted text preview: H2O is very permiable this explains why when the solute has a higher concentration of water we see an increase rate of weight over time. On the other hand sucrose is not as permiable this explains why the rate of weight over time is less than that of a solution with high water concentration. This proves that the concentration of osmotically active particles do influence the direction of water movement during osmosis. In the second expieriment we hypothesized that temperature does influence the rate of osmosis. The rate of osmosis in the egg increased wether the temperature was higher or lower. As the temperature goes up osmosis goes up. As temperature goes down osmosis goes up. We also hypothesized that the heated bath water would have a higher rate of osmosis than thecold bath water. We concluded that the change in temperature effects how well the water molocules move through the semi-permiable membrane of the egg. Andria Fisanich Professor Patrie Jonathan Boice MTWF 9-10...
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This note was uploaded on 04/07/2008 for the course BIO 150 taught by Professor Petrie during the Spring '08 term at Shippensburg University of Pennsylvania.

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Discussion for Osmosis Lab - H2O is very permiable this...

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