Investigation Of Osmosis In Potatoes
Aim:
To investigate the affect of different concentrations of sugar
solution on potato cells.
Variables:
The variables are; the concentration of sugar in the solution and the
mass of the potato cylinder. We will measure the mass of a potato
cylinder after a certain amount of time in a certain solution.
Fair test:
To keep the test fair we need to keep the controls the same. Like
keeping the temperature the same so the kinetic energy doesn't cause a
faster reaction.
Prediction:
I think that if the solution is more concentrated with sugar then the
mass should go down. I think this because the concentration is made
even inside and outside of the potato so water has to be removed to
equal the concentration levels. I think the opposite will happen in
weaker solutions, as water has to be placed in so the potato will
swell up and weigh more.
Apparatus:
This is the equipment we will use:
· Potato cylinders
· Cork boner (to make the cylinders)
· Beaker
· Ranger of sugar solutions (0M-1M)
· Balance
· 5 petri dishes
Diagram:
Method:
We will make four 2cm-potato cylinders using the cork boner for each
petri dish. We will measure each cylinder for its mass before the
experiment. We will then place the cylinders into the petri dishes for
around 5o minutes in each solution and then after the 50 minutes we
then re-weigh the cylinders to find either a decrease or an increase
in mass, note this down repeat it and make a conclusion on the
results.
Safety:
To keep the experiment safe we need to take extreme care when using
the scalpel. We also need to take care with the cork boner.
Results:
[IMAGE]
1st Results of my experiment
We found that the higher the concentration of sugar in the solution
the more mass the potato lost.
Osmosis Experiment Planning Aim: The main subject that I will be planning to investigate is the effects of a concentrated sucrose solution on potato cells on the basis of the Osmosis theory. Background knowledge: The plant cell and its structure To understand osmosis in detail I will need to explain the plant cell (which is the cell included in the osmosis experiment) and its cell membrane. Below I have a diagram of a plant cell: [IMAGE] Osmosis is about the movement of particles from a higher concentrated solution to a lower concentrated solution to create an ethical balance via a partially or semi permeable cell membrane. Osmosis in simple terms is the exchange of particles between the cytoplasm inside the cell and the solution outside the cell. What makes this exhange is the partially permable cell membrane.
* Note the mass down in the table at the end of the first page.
Investigate the Osmosis of Potato Cells in Various Salt Solutions. Introduction I have been asked to investigate the effect of changing the concentration of a solution on the movement of water into and out of potato cells. I will be able to change the input of my experiment. The input variable is the concentration of the solution.
I am going to carry out an experiment to measure the change in mass of
When doing this experiment I was able to see the effect of different concentrations on the rate of osmosis, each was done by measuring the initial mass and length of the potato cylinder and after osmosis, the results were conducted to show that as the sucrose concentration increases the rate of osmosis also increases as I said in my hypothesis thusly making a direct decrease in mass.
Conclusions: There is a pattern on the graph, and data table, which shows that as the concentration of the sucrose solution increases, the potato's percentage change in mass decreases.
the same way as it does potato. I would also widen the range of sugar
Osmosis in Carrots Background Osmosis is the diffusion of water from a dilute solution to a more concentrated solution through a partially permeable membrane, which allows the pass of water molecules but not solute molecules. [IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE]If a cell is placed in a less concentrated solution water enters because the less concentrated solution will have a high concentration of water than the inside of the cell. Once the cell takes in maximum water the cell becomes turgid. If the cell was to be placed in a high concentrated solution, water would leave the cell because the cell would contain a low concentrated solution. So in the low concentrated solution there will be a high concentration of water and in the high concentrated solution there will be a low concentration of water.
there would be no flow of water into or out of the cell so the cell
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.
Investigating the Effect of Sugar Solution on the Weight and Size of Potato Cells Aim: To investigate whether the different concentration of sugar solution will affect the weight and size of the potato cells. General background information: Osmosis is defined as the movement of water or any other solution's molecules from an area in which they are highly concentrated to a region in which they are less concentrated. This movement must take place across a partially permeable membrane such as a cell wall, which lets smaller molecules (E.g. water) through but does not allow larger solute molecules to pass through. The molecules will continue to diffuse until the area in which the molecules are found to reach a state of equilibrium, meaning that the molecules are equally distributed throughout the cell, with no area having a higher or lower concentration than any other hence equal. Hypothesis/prediction: For this particular investigation I believe that the lower the concentration of the sugar solution in the test tube the mass of the potato will be greater and the longer the potato cells will be.
When I am not using them I will place them away from my experiment and
Osmosis in Potato Tubes Osmosis: Osmosis is the movement of water molecules through a semi-permeable membrane from a high concentration to a low concentration. Diagram: [IMAGE] [IMAGE] Aim: To see the effects of different concentration of sugar solution on Osmosis in potato tubes. Key factor: In the investigation we change the sugar solution from: 0%-10%-20%-30%-40%-50% this is the independent variable; the dependant variable is the change in mass. Prediction: I predict that all the potato tubes in pure water or low concentration sugar solution will swell because water enters their cells by osmosis.
When you place a potato chip in a salt or sugar solution, then if the
= == In my investigation to find out how salt solution concentration affect the mass of potatoes, I will investigate how much the mass of a potato changes if I leave it in a beaker of water with a specified salt concentration for half an hour. I will change the salt concentration after each experiment. Background Knowledge --------------------