Plan: The aim of this investigation is to measure the rate of osmosis activity in a potato chip when placed in different solutions. Osmosis is the diffusion of water from a high water potential to a low water potential across a partially permeable membrane. Osmosis continues in this environment until a state of ‘equilibrium’ is achieved where the water gradient in one are is no different to another. The experiments I conduct will show the rate of osmosis between the potato chip and the solution. Variables: The variables which affect the rate of osmosis are: . Temperature.
Surface area. Solution Concentration. Length of experiment. Type of solution Temperature: Will affect the movement of surrounding molecules and so change the rate of diffusion.
Surface Area: With a larger surface area, it will mean that there is more area for osmosis to take place. Solution Concentration: Should mean that more or less water will move in or out of the potato chip. Length of experiment: A longer experiment will mean longer time for osmosis to occur. Type of solution: The solution being diluted may have an effect on how much osmosis may occur. The variable I will be changing to see a different of osmosis is the concentration or molarity of the salt solution. Method: To make it a fair test I will be doing the experiments in the same room at the same time to keep temperature change minimal, keeping the chips the same general size, repeating the experiment 3 times for each concentration of solution and keeping the length of the experiment the same.
The Essay on Osmosis In Tomatoes Molar Concentration
... prediction of the experiment graph. It shows that the potato cells increase in mass in solutions with a high water concentration and decrease in ... This is where no osmosis is taking place, both the potato and the solution have an identical molar concentration. The next point, 0. ... the surface area and so the overall rate of osmosis. If I were to repeat the experiment I would have possibly found a ...
The experiment will be set up using the following equipment: Potatoes, Sodium Chloride Solution (different molarities needed), Water, Paper towels, a Balance, Stopwatch, Test tubes and a Rack. Each experiment will last 20 minutes long and will repeated 3 times for each concentration.
