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.
Also we could have done the experiment a couple of times to get better
results.
The chip that was soaked in water gained weight, becoming turgid. The
chip in sucrose lost weight and the chip in equal sucrose: water also
lost weight.
Method
In this experiment I will use 5 potato chips, I 'm using potato chips
because they have lots of cells in which will give us better results
to explain osmosis. And will use five to give us more accurate and
better results. I will make sure the potato chips are measured
accurately, each weighing roughly the same size and making sure no
excess skin is left on. Before placing the chips in the solutions I
will measure them and record their results. I will then place the 5
potato chips in 5 separate test tubes filled with different
concentrations. For this experiment we are going to use
concentrations, 0, 0.25, 0.50, 0.75 and 1.00 all measured in moles. To
make sure these concentrations are accurate I will use a syringe to
measure out the concentrations. I will use this table to help me.
Investigation of the Concentration and the Effect of Sucrose on Osmosis in Apple and Potato Tissues
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.
Finding Out the Changes of Mass in Potato Chips Due to Osmosis Aim: We have been asked to investigate the effect that osmosis has on potato chips. Prediction: I predict that the potato cylinder in the lowest sugar solution (water) will gain the most mass through osmosis, whereas the 80% sugar concentration will lose the most mass through osmosis. I predict this because I think that the potato chips will try to gain and lose water between the two sides of its cell wall in order to reach an equilibrium between them. Because the 80% sugar solution has a high amount of sugar molecules, which can not diffuse through the membrane, I think that the potato will lose water in order to make the solution on the outside of its membrane equal to the water concentration on the inside (thus losing mass). I also predict that the other concentrations (60%, 40%, and 20%) will lose mass, but in lower numbers compared to the 80% sugar solution (the lower the concentration, the higher the mass).
An Investigation to Find the Effect of Sugar Concentration on Osmosis in Potato Chips Introduction: Osmosis is the passage of water molecules from an area of high concentration to an area of low concentration through a partially permeable membrane. In this case, Osmosis applied to the practical because the aim was to see if a sugared solution had an effect on osmosis in potato chips, it was intended to find out if different concentrations of sucrose solution caused a selectively permeable membrane, or a potato chip, to become larger or smaller. It was planned to use six different concentrations of sucrose solution and for each concentration; three sets of results were taken. The change of weight for each result was then found and finally, the average weight change was found. Prediction: It was predicted that the higher the sugar concentration, water would transfer from the potato into the sugared solution making the potato decrease in weight, and vice versa for the lower sugar concentrations.
The potato is the storage part of the plant and so this is where the
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
I am going to carry out an experiment to measure the change in mass of
will give us a clear set of results which will enable us to draw a
Investigation of Factors Affect Osmosis in Potatoes Aim The aim of the following experiment was to investigate the effect of varying the concentration of sucrose solution on osmosis in a potato. Preliminary Experiments One preliminary experiment was done before the main experiment. From the preliminary, we were trying to find out how osmosis actually occurred in potatoes, and gave us a vague idea on what the main experiment would be like. This preliminary will aid my prediction, which is stated below. The following apparatus was used for the preliminary: * 1 large potato (skin intact) * 3 boiling tubes * Set of cork borers * Scalpel * Balance (accurate to 2 decimal places) * Distilled water * 0.5M sucrose solution * 1.0M sucrose solution * Dropping pipette * Boiling tube rack * Measuring cylinder (accurate to 1cm3) * White tile Take a large uncooked potato, with the skin still on, and with the cork borer, cut out three "tubes" of potato.
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.
Investigating The Effect Of Concentration Of Salt Solution On The Mass Of Potato Chips Aim: The aim of this investigation is to see whether the amount of salt solution affects the mass of the potato chip Hypothesis: In the solution below, water will diffuse from the dilute solution into the concentrated solution through the process of osmosis. Therefore the dilute solution level will fall and the concentrated level will rise Line Callout 2: Disapproved (is unable to go through the semi permeable membrane O Line Callout 2: Approved (is able to go through the semi permeable membrane P Salt solution Water [IMAGE] When a substance such as salt dissolves in water, the substance's molecules stick with some of the water molecules, so the concentration of the water molecules decreases. When the water molecules are the same concentration on both sides of a semi permeable membrane and salt is dissolved into one of them, osmosis will occur as shown in the diagram below.
water in the potato, then the water will go out of the potato and into
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.