Osmosis of Potato Chips
Introduction
For this coursework, I am planning to conduct a series of experiments
which will hopefully show me how much percentage change in mass will
happen in potato chips when osmosis is present. To find out the change
we will have to choose a variable to change. We could change:
Ÿ The length of the potato chips.
Ÿ The weight of the potato chips.
Ÿ The concentration of the sugar solution.
Before my final experiment I will conduct one of the experiments in a
mini pre-test. These results will help me choose whether I should base
my final experiment on length, thickness or material.
I will choose the length of the potato chip for my pre-test and the
prediction, method and results for this pre-test can be found at the
back of this coursework.
Planning
Theory
Osmosis is basically the transfer of liquid from one concentration to
another through a semi permeable membrane. This transfer will equal
out the concentration on both sides of the membrane.
Stage 1
The right side of Figure 1 is the most concentrated side. It is full
of sugar molecules which want to be evened out over both sides of the
semi permeable membrane.
Stage 2
Figure 2 shows that some of the sugar molecules have passed through
the membrane to equal out the concentrations.
Main Experiment
For this experiment I will be look at how the concentration of the
sugar solution will effect the percentage change in mass.
Apparatus
I will be using this set of equipment to conduct my experiment:
10 Potato Chips
10 Petri Dishes with Lids
Bottles of different Sugar Concentrations (0g/l, 50g/l, 100g/l, 150g/l
and 200g/l)
Weighing Scales
Calculator
Prediction
I predict that as the concentration of the solution rises, the
percentage change will fall. I think this because when the sugar
molecules pass into the potato chips, they will displace the water in
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).
The purpose of the Tonicity lab was to help identify the effects of an isotonic, hypertonic, and hypotonic solution to a slice of potato. The difference between diffusion and osmosis is that diffusion is the movement of particles or molecules from a region of higher concentration to a region of a lower concentration. While osmosis consists of the movement of water molecules through a semipermeable from a region of high water concentration to the region of less water concentration (Major Differences). Tonicity is the ability of a solution to ?alter the internal water volume of a cell? (Difference Between Solution, 2013). An isotonic solution should keep their normal shape; the osmotic pressure outside the cell has the same pressure within the cell. A hypotonic solution, are more dilute and contain a lower concentration of nonpenetrating solutes than cells. In contrast, a hypertonic solution have a higher concentration of
Investigating the Effects of Varying Sugar Concentration on the Amount of Osmotic Activity Between the Solution and Potato Tubes
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
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.
Potato cells, diffusion, osmosis, and tonicity by Michaela Cupp. Science Experiment Topic: Which solution will help absorb the red dye into the potato cells, pure water or 50% salt water? Related research topics/terms: Diffusion, Osmosis, Tonicity are things I found during my experiment. An explanation of the links between the topics:
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.