Topics: Sodium chloride, Chemistry, Chlorine Pages: 3 (1146 words) Published: May 20, 2013
The effect of Sodium Chloride (NaCl) salt concentration on osmosis in potato cells The movement of substances in plant cells involves many processes and systems, all of which may affect the plant bio-chemically and physically, and one of these processes is osmosis. Osmosis is the flow of water through a semi-permeable membrane of a cell moving from an area of higher water potential to an area of lower water potential until reaching equilibrium known as isotonic. Before reaching the point of being isotonic, a cell may be either turgid, flaccid or plasmolysed cell. After considering all the relevant factors that affect the rate of osmosis such as temperature, permeability, surface area and concentration, I have selected the topic that I will be exploring and describing which is how the concentration of the solution can affect the rate of osmosis within a certain volume of a cylindrical piece of potato. I hypothesise that the concentration of the solution can affect the rate of osmosis which can be measured by testing under a period of time if the potato expanded and gained mass or contracted and lost mass as well as remain in the same condition. I also believe that the lower the concentration of the salt in the solution, the lower the rate of osmosis. The following bullet points are a summary of my expectations:- * If the concentration of the solution is lower than that of the potato, the water will move from the potato into the surrounding solution. * If the concentration of the solution is higher than that of the potato, the water will move from its surrounding solution into the potato. I will attempt to prove my hypothesis by experimenting on equal mass from the same potato and placing them in different concentrated solution starting from 10% sodium chloride to 90% sodium chloride and change the amount of concentration in the solution by 10% and leave them to create a fair test the independent variable has to be consecutive to provide a reliable...
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