osmosis in potato chips :: essays research papers

GCSE Biology Osmosis in a Potato charterTo investigate the effect of placing a piece of potato in a given strength of kail termination.PredictionI predict that, as the solution becomes more concentrated the more the cell willing shrink, as the water, of higher intentness inside the potato cells, flows down a concentration gradient into the solution, which has a lower concentration of water molecules. If we say that the piece change when the potato is placed in the 1M solution is x%. I predict that when the solution is 0.5M the percentage change will be 0.5x%, and when the solution is 0.25M strength I hypothesise the change will be 0.25x%.Variables description Dependant VariablesThe dependant variable is plotted on the y-axis. In this sample this is the change of mass of the potato when it is placed in different strengths of abrasion solution.Variables Description Independant VariablesThe independant variable is plotted on the x axis and is what you adopt to change in the ex periment. In this experiement it is the strength of the sugar solution.Variables Description perpetual VariablesThese stay the equivalent all the way through the experiment and atomic number 18 the fair examine rules. In this experiment that are that the amount of sugar solution used must always me 10.0ml. This is to be placed into the test tube. The solution needs to always be at the same temperature. We will make sure that all experiments are at 20 degrees centigrade beforehand we start the experiment. The size of the potato sample that we place into the solution as well as needs to be kept constant. A mass of 2.5-2.6g is sensible. The diameter is obdurate as the potato cork borer always measures to the exact same measurement. We also needs to make sure that the potato is left in the solution for the same time, 3000 minutes.EquipmentPotato Standard Sugar firmness of purpose Wash Bottle Test Tubes and Test Tube Rack bobber Borer Scalpel Cutting Board Scales accurate to 2.d. p 10ml Syringe Paper towels convention Stop Watch Method1.Firstly, the cork borer needs to be used to cut out a piece of potato at least 4 cm in space. This allows room for trimming dour untidy edges. 2.3.On the cutting board the cylindrical piece of potato needs to be cut to 35mm. Using a ruler, measure this as accurately as possible and cut the potato to 35mm in length using a scalpel. 4.Using the scaled weigh the potato to 2.