Osmotic Pressure and Water Potential Investigation
Raw data
(mol/l)
SUCROSE
APPLE PIECES
(cm)
SIZE/LENGTH
BEFORE/AFTER
AVERAGE LENGTH
B / A
(g)
MASS
BEFORE /AFTER
AVERAGE MASS
B / A
0
1
5.0 / 4.7
5.0 / 4.76
5.95 /
2
5.0 / 4.9
6.52 /
3
5.0 / 4.7
6.28 /
0,2
1
5.0 / 4.7
5.0 / 4.66
5.89 /
2
5.0 / 4.7
5.48 /
3
5.0 / 4.6
6.29 /
0,4
1
5.0 / 4.9
5.0 / 4.8
5.78 /
2
5.0 / 4.7
6.09 /
3
5.0 / 4.8
6.44 /
0,6
1
5.0 / 4.8
5.0 / 4.76
5.98 /
2
5.0 / 4.8
5.90 /
3
5.0 / 4.7
6.00 /
0,8
1
5.0 / 4.8
5.0 / 4.76
5.45 /
2
5.0 / 4.7
6.65 /
3
5.0 / 4.8
6.57 /
1
1
5.0 / 4.8
5.0 / 4.83
6.91 /
2
5.0 / 4.8
6.79 /
3
5.0 / 4.9
6.61 /
Results / Data
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[IMAGE]
We put samples of apple and potato tissue in 6 different sucrose
solutions of different molarities; we measured the change in mass. We
were waiting for half an hour and observing what happened with them.
We put our results in a graph and a table, but they do not seem to be
accurate.
Observations:
In some concentrations the apple and
- The nurse’s mistake will increase the saltiness due to the double amount of saline in the bag.
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 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 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.
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.
I expect my graph to look like it does on the next page because I
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.
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 Functions of Osmosis Osmosis is the passive transport of water through a selectively permeable membrane, a membrane that allows certain needed particles to pass through it more easily than others. Pores in this type of membrane are large enough for water to pass effortlessly through it. The flow of water during osmosis depends on the concentration of a solute either within a cell membrane or surrounding the membrane. Water naturally flows from a hypertonic solution, an area of high concentration of solute, to a hypotonic district, a solution containing a lower concentration of solute.
Osmosis Introduction Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration. The aim of the investigation is to find the variables that affect the rate of osmosis and how they affect the rate of reaction. The variables that affect the rate of reaction of osmosis are, · The surface area of the object, · The concentration of the solution, · Temperature of the experiment Surface area If the surface area of the object is larger then more molecules can pass through the semi-permeable membrane. This will ultimately increase the rate of reaction. [IMAGE] [IMAGE] [IMAGE][IMAGE] Small surface area Large surface area Concentration
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
when to do it etc. This should lead me to good results at the end of
This graph shows the result that I expect to get, I expect to see a