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My main aim in this experiment is to find out whether Osmosis occurs in a potato and also how it affects the potato in different mol solutions of sucrose and water.

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Osmosis Investigation Aim My main aim in this experiment is to find out whether Osmosis occurs in a potato and also how it affects the potato in different mol solutions of sucrose and water. Equipment - Cutting tile - the support for the cutting of the potato Knife - to cut the potato Measuring cylinder - to measure the solutions Distilled Water - Part of the experiment Sucrose - Part of the experiment Potato - Part of the experiment Tissue Paper - to dry out the potatoes after osmosis takes place Cork Borer - to cut out potato cylinders Ruler - measure the length of the potato Tongs - for picking the potatoes after the Osmosis has taken place Osmosis is defined as the net movement of water or any other solution's molecules from a region in which they are highly concentrated to a region in which they are less concentrated. This movement must take place across a partially permeable membrane such as a cell wall, which lets smaller molecules such as water through but does not allow bigger molecules to pass through. The molecules will continue to diffuse until the area in which the molecules are found reaches a state of equilibrium, meaning that the molecules are randomly distributed throughout an object, with no area having a higher or lower concentration than any other. ...read more.


So I predict, using all the scientific knowledge that I have gathered on Osmosis that the stronger the concentration of sucrose the shorter the length of the potato. The water in the potato transfers to the sucrose solution, because transfers from a high concentration to a lower concentration. Fair Test Fair testing should play an integral part in the experiment. The reason for this is that if I do the investigation unfairly then my results would be unreliable and would lead me to the wrong conclusions. First of all, I need to get the measurements of the potato chips exact, the reason being is that I will then have to measure the potato after the Osmosis has occurred, thus I need an exact length 2 CM for all of the potato chips. Also it will be vital for the experiment, that all the potatoes have to be covered the sucrose solution. Safety Safety is the most important thing in an experiment, even when they may seem harmless. I will be using a sharp knife to cut the potatoes into cylindrical pieces and if I don't use it properly then I could injure my self or someone else that is around me at the time of use. Method I believe that this experiment is very easy to carry out as the core of it is to potato chips in the sucrose solution over around about 24 hours, so that Osmosis can occur between the potato and the sucrose. ...read more.


However nothing is perfect and my results could have been slightly better. I could have made some certain procedures before doing the investigation. They maybe small things, but could have a bearing some of the results. These procedures are as followed; * Checking the mass of each potato chip * Putting all five of the potato chips in the sucrose solution at the same time. * Giving all the potato chips the EXACT time for Osmosis to take place. * Leaving all the potato chips in the sucrose solution for longer than one day, for Osmosis to reach maximum capacity. * Getting a group of people to the experiment, one to cut the potatoes, one to dry the potatoes after Osmosis has taken place. All those points can significantly improve my results, as they more or provide a better ground for Osmosis to take place. Checking the mass of the potatoes I feel was one thing I should have defiantly done. When I recorded the length of the third potato chip for the distilled water solution (in my preliminary section). I received an unreliable result, it measured at 2 CM exactly. This means that no Osmosis had taken place at all during the 24 hours allotted. This cannot be possible as some Osmosis should have taken place. I then checked the mass of the potato and found out that it was significantly lighter than the rest of the potatoes. All in all I am reasonably happy with my results; they have backed up my prediction. Treeshan Lalsing 10DH 24/09/03 ...read more.

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