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Osmosis is the movement of water molecules across a partially permeable membrane from a region high water concentration to low water concentration. A partially permeable membrane is a membrane with tiny holes in so small that only water molecules can pass through. ? I aim to see if the difference in concentration of the sugar solution effects the weight of the potato. ? The key variables: in this experiment are, the temperatures of the solution, size / weight of potato, concentration of the solution. ? The dependant variable: is the size of the potato slice I aim to keep the size at 2 cm by 2 cm squares. ? The chosen variable: is the concentration of the sugar solution.
The range of concentrations I will use isola solution. To dilute the concentration to 0. 2 moles / litre I will add 16 ml of water to 4 ml of I molar sucrose solution Etc. ? The method I will use is, firstly make up the correct molar solution. Then place 20 ml of that in petri dish. Weigh the slice of potato which s of uniform size and add it to the solution.
It shall be left for a measured amount of time, which I determined to be 15 minutes. Do this three times for every concentration. ?
Free research essays on topics related to: concentration, water molecules, potato, permeable membrane, membrane
Research essay sample on Permeable Membrane Water Molecules
