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Effects of concentration on the rate of osmosis
Effects of concentration on the rate of osmosis
Effect of concentration on rate of osmosis investigation
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Investigating The Effects Of Concentration On Osmosis
Preliminary Experiment: The Effects Of Osmosis On Potato Chips
==============================================================
Method :
We cut three potato chips to an equal length and then we set up 3
beakers, one containing a sugar solution, one containing water and one
containing a salt solution. We put one chip in each beaker and left
overnight.
Results :
Solution
Start (cm)
End (cm)
Difference
% Difference
Sugar
4.8
4.4
-0.4
-8%
Water
5
5.6
+0.6
+12%
Salt
5
4
-1
-20%
Conclusion:
The water moved into the chip cells so the size increased, the salt
solution was a lower concentration so the water moved out of the chip,
this also happened to the sugar solution.
Experiment To Determine The Concentration Of The Cell Sap Of Potato
Introduction:
I am trying to find out the exact concentration of water in the cell
sap of a potato cell. My preliminary experiment will help with this as
I already know that distilled water moves in to the cell while a sugar
solution causes water to move out of the cell.
Prediction:
I think that a sugar solution of 0, the potato cell will increase,
between 0-1, the potato will stay the same and a concentration of 1 or
above, the potato cell will decrease in size. I think this because in
osmosis, water moves from a high concentration to a low concentration
of water.
Apparatus:
6 test tubes to put the solutions in
Distilled water to put a potato chip in
A solution of 0.2Molar to put a potato chip in
A solution of 0.4Molar to put a potato chip in
A solution of 0.6Molar to put a potato chip in
A solution of 0.8Molar to put a potato chip in
A solution of 1Molar to put a potato chip in
- The nurse’s mistake will increase the saltiness due to the double amount of saline in the bag.
If we say that the right hand side in picture 1 is the potato, and the
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.
Food is an important factor in the everyday human life. Humans need food to be able to live. But how did the food people eat today come about, no one really knows the in depth explanation. What about more common foods that are a part of everyone’s everyday lives, like potato chips. They are a simple, easy snack food that is commonly in every American household. But does anyone know how they came about, who invented them. Well, let me explain a little about who that person was.
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.
We then put the stopwatch on and left them for half an hour. After we weighed each potato tube and recorded our results. We did the experiment twice. We did this to make sure our results were correct. Preliminary method: We did everything the same as in our other experiment except we
molecules go in and out of the cell. There is no net movement of water
cork borer and a ruler. I will keep the potato chips the same size in
Size of potato-will be the same as it will be cut using a cork and borer which cuts them all to the same diameter.
4. Put each group of potato discs in one of the 6 test tubes and watch
"How Potato Chips are Made." State of Michigan. Michigan Department of Agriculture, 10 May 2007. Web. 12 Feb. 2010. .
when to do it etc. This should lead me to good results at the end of
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.
Factors Affecting Osmosis The aim of this experiment is to investigate the factors affecting osmosis. I have chosen to investigate the effect varying concentration of sucrose solution has on the amount of osmotic activity between the sucrose solution and a plant cell. The plant cell I have chosen to use is a potato tuber from which I plan to cut potato chips of equal length which I will place in test tubes filled with varying concentrations at equal volumes of sucrose solution. After a set amount of time I will remove the potato chips and record the change in length.