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.
Investigating Osmosis In A Potato Introduction: "Osmosis is typically defines as the flow of one constituent of a solution through a membrane while the other constituents are blocked and unable to pass through the membrane. Experimentation is necessary to determine which membranes permit selective flow, or osmosis, because not all membranes act in this way. Many membranes allow all or none of the constituents of a solution to pass through; only a few allow a selective flow. In a classic demonstration of osmosis, a vertical tube containing a solution of sugar, with its lower end closed off by a semi-permeable membrane, is placed in a container of water. As the water passes through the membrane into the tube, the level of sugar solution in the tube visibly rises.
Osmosis in Potato Chips Preliminary Experiment to investigate Osmosis 1M Sugar 50:50 0M (water) Initial mass 2.40 2.05 2.34 Final mass 2.01 1.85 2.43 Change in mass -0.39 -0.21 0.09 % change in mass -12.5% -10.5% 3.84% Evaluation From doing our preliminary experiment it enables us to gain a better result for our real experiment. From this experiment we have learnt a few things through trial and error, for example. If we had used a wider variety of concentrations, our results would have been more accurate. By using a syringe to measure the solution we would have also got a more accurate result. We could have also weighed the potato chips more accurately so they were roughly the same size with no skin.
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.
* Note the mass down in the table at the end of the first page.
When you place a potato chip in a salt or sugar solution, then if the
I am going to carry out an experiment to measure the change in mass of
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.
the same way as it does potato. I would also widen the range of sugar
The experiment was quite reliable as I found out accurately the mass gained/lost through osmosis. However, due to the time constraints I couldn?t set up measures to ensure the temperature of each potato strip was the same and the surface area. Also I would have worn latex gloves to ensure that impurities would not go into the test tube while putting the potato strips in.
there would be no flow of water into or out of the cell so the cell
An Experiment to Investigate Osmosis in Plant Tissue. Aim: To conduct an investigation to compare the osmotic behavior of the osmotic animal. two types of plant tissue in varying concentrations of sucrose. solution. Then we can find the solution.
water in the potato, then the water will go out of the potato and into
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.
When I am not using them I will place them away from my experiment and
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.