Osmosis Investigation
To se 6/03e how varying the concentration of
Sucrose solution affects the water
Gain or loses on a potato
Chip during osmosis.
Aim
To investigate if osmosis occurs in potatoes and whether varying the
concentration of sucrose solution affects the water/mass gain or loss
in the potato chips when kept in a constant environment.
Equipment
* 5 same volume test tubes: to hold sucrose solution and potato
chips.
* 2M, 1M and 0.5 M sucrose solution (15ml)
* Distilled water: as a control to all the other experiments ( to
compare the pure water to the sucrose solutions)
* Test tube rack: to hold test tubes.
* Measuring cylinder (15ml): to measure sucrose solution)
* 5 small pieces of potato (0.7*0.7*3.1 cm)
* Knife: to cut potato into size.
* Pipette: to transfer sucrose solution from container to test tube.
* Mass balance: to measure mass of potato chips at beginning and end
of experiment.
* Timer: to time the experiment making sure each potato chip
receives the same amount of time in the test tube.
* Tissue paper: to dry the potato after osmosis has taken place- so
it is a fair test.
* Cutting tile: to cut the potato safely not damaging the lab
tables.
* Thermometer: to measure room temperature.
Diagram Test tubes
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[IMAGE] Sucrose solution
Test tube rack
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Potato
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2M 1.5M 1M 0.5M Distilled water
- The nurse’s mistake will increase the saltiness due to the double amount of saline in the bag.
...ond sets of data concluded that sucrose, glucose, and salt are hypotonic solutions that will remove water from a cell due to their tonicity. In the final part of the lab, results concluded that water potential moves along its concentration gradient (high to low) in an attempt to maintain equilibrium. It was determined that the orange and green solutions were hypotonic as they added water to the cells, whereas the blue, red, purple and yellow solutions were hypertonic as they sucked water from the cells.
Considering the fact that Marc has both been sweating and drinking minimal amounts of water, Marc is now dehydrated. This means he has less than the required amount of water for his body to complete the processes necessary to maintain its health. As stated in the question, the process of sweating causes the loss of more water than solutes. This means that as the level of water decreases, the level of solute concentration will increase, creating a change in the water to solute ratio.
Investigating the Effects of Varying Sugar Concentration on the Amount of Osmotic Activity Between the Solution and Potato Tubes
Osmosis and Diffusion Investigation Aim: To examine the process of osmosis and diffusion. Part A: Step 1: Q1.[IMAGE] Q2. The jiggling motion is visible because the fat globules are constantly being bombarded by smaller particles. [IMAGE] Q3.
Abstract: In this lab, carrots were placed in sugar solutions of varying sugar concentrations. The effects of osmosis and cellular diffusion are going to be observed as the carrots gain or lose weight in the solutions over the period of time. The weights of the carrots will be measured after 30 min, and again after 24 hrs. The purpose of this lab is to find out how the cells in carrots will react to various sugar concentrations. The idea is that the cells will absorb the water and become heavier and supple.
The Effect of Solute Concentration on the Rate of Osmosis Aim: To test and observe how the concentration gradient between a potato and water & sugar solution will affect the rate of osmosis. Introduction: Osmosis is defined as, diffusion, or net movement, of free water molecules from high to low concentration through a semi-permeable membrane. When a substance, such as sugar (which we will be using in the experiment we are about to analyse), dissolves in water, it attracts free water molecules to itself, and in doing so, stops them from moving freely. The effect of this, is that the concentration of (free) water molecules in that environment goes down. There are less free water molecules, and therefore less water molecules to pass across a semi-permeable membrane, through which sugar molecules and other molecules attached to them are too big to diffuse across with ease.
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.
An Investigation of Factors Affecting the Rate of Osmosis Introduction Osmosis is the movement of water molecules across a semi permeable membrane from a region of high water concentration to a region of low water concentration. [IMAGE] A semi permeable membrane is a membrane with very small holes in it; they are so small that only water molecules can pass through them. Bigger molecules such as glucose cannot pass through it. In actual fact water molecules pass both ways through the membrane, but because there are more water molecules in the high concentration region than the other there is a steady net flow into the lower concentration region. The lower concentration is the stronger solution, such as a glucose solution.
The experiment is aimed at giving a better understatement of osmosis process and the different conditions in which osmosis occurs.
We cut three potato chips to an equal length and then we set up 3
Osmosis is the facilitated diffusion of water across the cell membrane of a cell. The inside layer of the cell membrane is hydrophilic, meaning water cannot easily pass through the membrane. The cell membrane has to have aquaporins, which are water channel proteins, that move the water across the membrane. If there is a water and salt solution outside the cell, the salt can enter the cell by diffusion, but the cell membrane is not permeable to the water. Because there is more solute solution inside the cell, there is less water. The aquaporins move the water across the membrane until equilibrium is reached.
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.
when to do it etc. This should lead me to good results at the end 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.