Find out the concentration of the cell contents of a potato :: GCSE Biology A2 A-Level Coursework

Find out the submerging of the cell contents of a white stump spudIntroductionOsmosis is the diffusion of water from a lower compactness of soluteto a higher niggardness of solute through a partially porousmembrane. This lets smaller molecules such as water, pass through butdoes not allow bigger molecules through. The molecules continue todiff accustom until they reach a balance state, where no ara has a higheror lower slow-wittedness than any other.In a high concentration of water the measuring of dinero solution is low.This is called a weak/dilute solution. In a weak concentration ofwater the amount of scratch solution is high. This is called astrong/concentrated solution.When a semi-permeable membrane divides two solutions, the water ordainmove from the area of high concentration to the area of lowconcentration, until both(prenominal) sides are equal.AimTo find out how much sugar concentration there is in a cell of apotato. This means I exit put the potato cylinders in differentsolutions of different concentrations. in that respect are also other factors involved, these are Temperature of water Size of potato cylinder Mass of potato cylinder Volume of solution potato cylinder is in Type of potato Time left in solutionFair TestingIf this investigate isnt a reliable test, we testament be collecting the wrongresults, which can lead us to the wrong conclusions. To conduct a fairtest I leave break that the experiment is carried out at roomtemperature. The size of the potato is an important factor, as theamount of weight lost or gained will alter. Also the potato cylinderswill be weighed before and after the experiment to see if osmosis hastaken place. The type of potato I will use will stay the same asdifferent potatoes may charter at different rates.Planned MethodA range of sugar solutions will be arranged with concentrations..Sections of potato will be glow with a scalpel and measured with aruler. This has to be done carefully as the differ ence of surface areamay allow more or less osmosis to occur. The mass of each cylinderwill be weighed to ensure consistency. I will do each experiment three time so that I can take an average for each sugar solution. By doingthis I will receive more accurate results and whence draw up a moreaccurate conclusion. I will also use 20 ml of each solution and of pink water. The potato cylinders will then be left for 15 minutes. Whenthe cylinders are maked I will clean them with a paper towel, toremove excess moisture, and then re-weigh them.PredictionFor this investigation, I think the lower the concentration of the