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To find out the concentration of cell sap
Member rating: No Rating | Words: | Submitted: Thu Sep 04 2003
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Aim of the Experiment: To find out the concentration of cell sap Scientific Background Osmosis is the net movement of solvent molecules (water) through a semi permeable from an area of high water concentration (hypotonic solution) to an area of low water concentration (hypertonic solution). A semi-permeable membrane/partially permeable membrane is the one with tiny holes that are just big enough to let small water molecules through. Bigger molecules such as glucose can't pass through the semi-permeable membrane. In osmosis water molecules pass both ways through the membrane but the overall movement is from a hypotonic solution to a hypertonic solution. The diagram below shows osmosis in action: Osmosis occurs in plants. Plants need water in order to survive. They use this water in keeping cool, making glucose in photosynthesis, transporting food and mineral and keeping upright and rigid. The plant takes in this water through the roots. When the water level...
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