Investigating Osmosis in Potato Tissue
Aim
To estimate the concentration of sucrose in potato tissue.
Hypothesis
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I believe that the potato tissue that has been in the hypotonic (0.1M
sucrose) solution will be more turgid than before, while the tissue in
the isotonic (0.3M sucrose) will be similar to its previous state. The
tissue that has been in the hypertonic (0.5M sucrose) should be far
more placid than it was before. This is because of osmosis - water
diffusing in and out of the potato tissue cells.
Apparatus
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· 1 potato tuber
· 1 cork borer
· 1 ceramic tile
· 1 scalpel
· Paper towels
· 6 boiling tubes
· 1 marker pen
· 0.1M, 0.3M, and 0.5M sucrose solution
· Access to an electric balance
· 1 funnel
Method
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The volume of each boiling tube was calculated, and then 2 tubes were
half-filled with 0.1M sucrose solution, 2 tubes were filled with 0.3M
sucrose solution, while the final 2 tubes were filled with 0.5M
sucrose solution. Then 6 cylinders of potato were cut from the tuber
using the cork borer. These were then all cut down to 20mm in length
using the scalpel. They were then dried with the paper towel to remove
excess water before being weighed on the electric balance. The weight
of each was recorded. They were then all immersed in the solution in
the boiling tubes, and the tubes were labelled using the marker pen
and then lids were put on. They were then left for 24 hours in a
moderate temperature before being taken out and dried using the paper
towels. They were then weighed on the electric balance and the final
mass was recorded. The cylinders were then gently squeezed to
determine the condition of the potato tissue after osmosis - very firm
(turgid), firm, or soft (flaccid). The percentage difference between
the mass before and after the experiment was then calculated, and the
left over and a little acid was made, while alot of water was made. Basically all we
is put in pure water it will become turgid and it will not burst due
because this is what makes the plant "stand up" and acts as a form of
berries that they have gathered they had this coiled basket that they made in order to cook in or
* Note the mass down in the table at the end of the first page.
I am going to carry out an experiment to measure the change in mass of
the same way as it does potato. I would also widen the range of sugar
homes for weeks. Left over meals were thrown onto the ground for animals, also feeding
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
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 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.
water in the potato, then the water will go out of the potato and into
The crucible and lid are heated at the beginning of the experiment before being weighed so that any moisture in the crucible is burned away.
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.