Investigating the Effect of Different Concentrations of Sugar Solutions on Potato Chips
Aim: -
To investigate the effect on potato chips in different concentration of sugar solutions.
Introduction: -
Osmosis is the net movement of water molecules from a region where there is a higher concentration of water molecules to the region where there is lower concentration of water molecules. The water molecues move through a partially permeable membrane, which allows the smaller molecules to pass but not the big ones. The diffusion of molecules from the region of higher concentration to the region of lower concentration until the concentration of water molecules has become same in both the areas.
Precautions to make the test fair:
For a fair test certain factors had to be kept in mind. I decided to choose sugar solutions of different concentrations so that I get different sets of result containing information about the change in mass, change in length and the mass and length of potato chips after the experiment. If any of the factors were not kept constant it would mean that the test is not fair. Such as: -
· All the potato chips have to be of the same length so that the area at which osmosis occurs is the same.
· Doing all the tests at one temperature will control the temperature. For the purpose of my experiment I am going to do all the experiments at room temperature.
· I will use the same potato so that the potential to absorb water is same.
· The mass of the chips of the potato will be same so that the test is fair. Mass will be measured in grams. The potato chip will be measured before it is put in the solution, and after is I taken out of the solution. This will allow us to see whether osmosis has taken place, and to what extent.
· The amount of solution should be same in each of the solutions.
way. I will put each piece of potato into the 5 test tubes and add the
B will have this size potato in but cut in half and Test tube C will
Conclusion In my conclusion, the potatoes with the lowest concentration gained the most mass, and would become hard relating back to the Turgor theory I stated earlier. In contrast to this, the potatoes in the most concentrated solution lost the most weight thus becoming plasmolysed and limp also relating back to the background I have mentioned earlier. Evaluation In general the experiment was succesful the results were consistent and also were in accordance with the theories made at the start.. The experiment could have been improved by: · More subjects used instead of potatoes · More potatoes · Wider time ranger · Different molarities Using this variety of methods could have improved the experiemnt, however I was generally satisfied with the results of this osmosis experiement.
If the concentration of one side of the membrane is greater than the molecules will travel from the higher to lower concentration. Eventually there will be a dynamic equilibrium and there will be no net movement of molecules from one side to the other. Osmosis is the diffusion of water. Like diffusion, the water moves from a region of higher water potential to a region of lower water potential.
The third potato chip will be placed in a hundred percent solution. I believe that this will make the potato chips shrivel and become flexible and stringy. This is because there is a higher concentration outside the cells and the water is being taken out to even the concentrations. This is what happens when a plant dies. The water leaves it in osmosis and the plant wilts and dies.
potato chips left in a sugar solution for a period of 1 hour. I will
cork borer and a ruler. I will keep the potato chips the same size in
Type of tissue- this will be controlled by using only one type of tissue, which is the potato
Water Potential of Potato Cells Aim: To demonstrate the Water Potential of Potato Cells. Objectives: · To show the water potential of potato cells using various measured concentrations of a sucrose solution and pieces of potato. · To record and analyse data to verify observed results. · The method and procedure was carried out as per instruction sheet. Observations: The experiment shows that the lower the concentration of the sugar solution, in the Petri dish, the mass of the potato increased.
However, the solution could be more water than salt so the water from the solution could be more concentrated than the water inside the potato cells. If so then In theory the water in the solution should diffuse into the potato. cells and increase in mass. Apparatus: Potato to perform the experiment on. Thin metal tube to cut potato chops with.
Paper Towels Variables: To enable fair test certain aspects of the experiment will have to be
* Amount of sugar solution in each test tube. * The potatoes have to have the same mass.
Part A of the experiment, we were measuring the density of water. In this part, we measured by difference by measuring the mass of the empty graduated cylinder which was 46.35 grams and then added 25.0 milliliters of water to it. When subtracting by difference, our mass of the water was 25.85 grams. This was close to the measurements of the water added to the graduated cylinder. The density of the water was 1.0 grams/milliliters.
When you place a potato chip in a salt or sugar solution, then if the
Osmosis is the passage of water molecules from a weaker solution to a stronger solution through a partially permeable membrane. A partially permeable membrane only allows small molecules to pass through, so the larger molecules remain in the solution they originated in. Solute molecule [IMAGE] [IMAGE] Water molecule [IMAGE] The water molecules move into the more concentrated solution. When water enters a plant cell it swells up. The water pushes against the cell wall and the cell eventually contains all that it can hold.