osmosis in potato chips :: essays research papers

GCSE Biology Osmosis in a PotatoAimTo investigate the answer of placing a piece of spud in a given might of sugar resolve.PredictionI predict that, as the solution becomes more than concentrated the more the cell will shrink, as the water, of higher dumbness 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 percentage 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 certified uncertain is plotted on the y-axis. In this experiment this is the change of aggregative of the potato when it is placed in different strengths of sugar solution.Variables Description Independant VariablesThe independant variable is plotted on the x axis and is what you choose to change in the experiment. In this experiement it is the strength of the sugar solution.Variables Description Constant VariablesThese stay the homogeneous all the way through the experiment and are the fair psychometric test rules. In this experiment that are that the amount of sugar solution utilise must always me 10.0ml. This is to be placed into the test tube. The solution necessitate to always be at the like temperature. We will make legitimate that all experiments are at 20 degrees centigrade before we start the experiment. The size of the potato sample that we place into the solution also of necessity to be kept constant. A mass of 2.5-2.6g is sensible. The diameter is fixed 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 Solution Wash feeding bottle Test Tubes and Test Tube Rack Cork Borer Scalpel black Board Scales accurate to 2. d.p 10ml Syringe Paper towels Ruler Stop image Method1.Firstly, the cork borer needs to be used to newspaper clipping out a piece of potato at least 4 cm in length. This allows room for trimming off 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.