Osmosis Investigation
Aim:
My aim is to find out what effect different concentrations of salt
solution has on a potato chip when left for a certain amount of time.
Also my main objective is to find the isotonic point of a potato. The
isotonic point is the point at which the concentrations of water are
the same at each side of the semi-permeable membrane (in each region).
When there is equal flow in each direction through the membrane, when
the water is diffusing into the cell and out of it at the same rate.
Plan
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The variables that could affect osmosis in my investigation:
* Potato Chip Area/Mass/surface area
* Amount of water
* The Molar of the solutions
* The temperature of the solutions
* Amount of time the chips are in the solutions
I am going to find out the isotonic point of a potato by varying the
Molar of each solution, so my input variable is the Molar of the
solution and my outcome variable is the percentage change in mass of
each potato chip after they have been submerged in a solution of a
specific Molar for an amount of time.
I am going to keep these variables the same to keep my investigation
fair.
* Same potato used for potato chips
* The temperature of each solution (degrees Celsius)
* The amount of solution in each experiment (ml)
* The time the chips are left in the solutions (minutes)
I am controlling the Molar of the solutions.
I am not keeping the mass of each potato chip the same as I am
recording the percentage change in mass to get more accurate results
as its is difficult to cut the chips so exact as to keep the test
fair.
I am going to keep the temperature the same in all experiments because
the water an dissolved salt molecules will have the same amount of
way. I will put each piece of potato into the 5 test tubes and add the
-The cells in the body will increase because osmosis causes molecules to move from a less concentrated solution to a more concentrated solution.
on are at 0 before weighing the chip, as it may add some mass to the
of the marble chips the same. I will do all of the experiment on the
The experiment is aimed at giving a better understatement of osmosis process and the different conditions in which osmosis occurs.
When you place a potato chip in a salt or sugar solution, then if the
surface area of the potato chip, first I will put it in the beaker as
cork borer and a ruler. I will keep the potato chips the same size in
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 variables I could change would be the temperature of the solution. The higher the temperature of the solution the more osmosis would occur. The surface area of the potato strip, the larger the surface area the more osmosis would occur as there would be more area exposed for osmosis to take place. The concentration of the solution will affect osmosis, the higher the concentration the less osmosis would take place. The duration of the experiment also affects how much water is gained/lost by osmosis as the longer the duration is, the more osmosis would take place (osmosis would stop as soon as it reaches an equilibrium of water content inside and outside the cell.
Every matter is made of molecules and they are always in motion. However, there are different types of movements and one example is osmosis, which is a type of passive transport, meaning that they do not need energy to move areas of high concentration to areas of low concentration. Osmosis is the diffusion of water across a selectively permeable membrane which means that water can go through membranes from areas where there are a lot of water molecules to areas where there are not so many water molecules. Adding on, cells must continue keeping an internal steady state called homeostasis in order to continue performing their functions. A selectively permeable membrane is used to maintain the homeostasis by controlling the movement of materials into and out of the cell as well as telling different substances apart and slowing down or stopping the movement of some substances while allowing others to pass through freely.
To improve the method, I would have used a machine to cut the chips to
I will weigh out one gram of marble chips using a balance and put it
Type of tissue- this will be controlled by using only one type of tissue, which is the potato
From this rudimentary description of the production of potato chips, one can see that the main ingredients include potatoes, oil, and some salt. However, what may not be so apparent are the “non-ingredient” inp...