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Osmosis in potato
Osmosis in potato
Method for potato cell sap concentration experiment
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Determining the Concentration of the Cell Sap in Potato Storage Tissue
Aim: To determine the concentration of the cell sap in potato storage
tissue. By using Osmosis, determine what the sugar concentration of
cell sap is.
Prediction
I predict that the potato segment in the distilled water will
definitely gain in weight because the solution outside it has a much
higher concentration of water then in the cell sap meaning Osmosis
will occur and the potato segment take in water. I predict that 0.2M
sugar solution will also gain weight because it still has quite a high
concentration of water outside the potato. The potato in the 0.4M
solution will gain weight but the potato in the 0.6M and 0.8M
solutions will lose weight. The glucose concentration of the cell sap
will be between 0.4M and 0.5M.
Scientific Knowledge
====================
This experiment is based on the concept of Osmosis. Osmosis is the
diffusion of water molecules from a region of high water concentration
to a low water concentration through a semi permeable membrane (in
this case, the cell potato cell membrane). The cell walls of the
potato cells are semi permeable meaning that water molecules (which
are small) can fit through but other bigger molecules such as glucose
cannot pass through. The water molecules can flow both ways through
the membrane, letting molecules both in and out.
The Kinetic theory states that all molecules of every substance have
energy which causes them to move about for example a chemical reaction
can be accelerated through heating because the molecules gain more
energy efficiently causing harder and more effective collisions of the
molecules. In water the molecules have energy which makes them move,
it is this energy which powers Osmosis and allows water molecules to
pass through the semi permeable membrane.
The experiment uses Osmosis to make an estimation of the concentration
of the cell sap in the potato storage tissue. The cell sap is a
solution mainly of water, sugar, starch and salts.
Investigating Osmosis in Potatoes Aim: Investigate the movement of osmosis through a selectively permeable membrane, in this case potato. Introduction: Osmosis is the movement of water through a semi permeable membrane. The water passes from an area of high concentration to an area of low concentration, until the two concentrations are equal in concentrations of water. Many cell membranes behave as semi permeable membranes, and osmosis is a vital part in the movement of liquids in living organisms, for example, in the transport of water from the soil to the roots in plants.
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.
The Effect of Different Strength of Salt Solutions on Potato Cells Through Osmosis An Investigation to find out how different strengths of salt solution affect potato cells through osmosis. Aim I aim to investigate the effect of different concentrations of salt solution on potato cells when osmosis occurs. Introduction I intent to set up this experiment using equally sized cylinders of potato submerged in salt solutions of different concentrations. I will then observe the percentage change in mass over a set period of time. This will show me how much osmosis has occurred.
Osmosis is a type of diffusion which is only applied on water and is a passive process which does not require an input of energy from the cell; this is because materials are moving with the concentration gradient. Osmosis is a process that occurs at a cellular level, which entails the spontaneous net movement of water through a selectively permeable membrane, from a region of high to low water concentration, in order to equalise the level of water in each region. This form of diffusion takes place when the molecules in a high concentration are too large to move through the membrane. The term semi-permeable or selectively permeable means that some substances can easily pass through the cell membrane, whereas others cannot. The significance of osmosis to cells is great, since it is the osmotic pressure that maintains the shape of an animal cell and provides support in the plant cells. Many factors affect the rate of osmosis including size of particles and temperature however in this particular experiment the factor investigated is the concentration of sodium chloride. Tubes of potatoes will be used to demonstrate the fact...
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.
If the concentration of sucrose increases, then the mass of the potato will decrease. However, if the concentration of the solution in the beaker is less than that of the potato (such as distilled water), then the mass of the potato will increase. So, as the concentration of sucrose increases the rate of osmosis increases.
the same way as it does potato. I would also widen the range of sugar
there would be no flow of water into or out of the cell so the cell
Investigating the Effects of Different Concentrations of Sucrose Solution on Potato Cells Aim: to investigate the different effects of various concentrations of sucrose solution on potato cells. Introduction: Osmosis is a special type of diffusion. Osmosis happens when two solutions of different concentrations are separated by a selectively permeable membrane. A selectively permeable membrane has holes in it which are just big enough for water molecules to pass through, but not the much larger sugar molecules. Water moves across the membrane from a weak solution (high concentration of water molecules) to a stronger solution (lower concentration of water molecules).
Investigation of the Concentration and the Effect of Sucrose on Osmosis in Apple and Potato Tissues
How the Concentration of the Substrate Affects the Reaction in the Catalase Inside Potato Cells
Purpose: This lab gives the idea about the enzyme. We will do two different experiments. Enzyme is a protein that made of strings of amino acids and it is helping to produce chemical reactions in the quickest way. In the first experiment, we are testing water, sucrose solution, salt solution, and hydrogen peroxide to see which can increase the bubbles. So we can understand that enzyme producing chemical reactions in the speed. In the second experiment, we are using temperature of room, boiling water, refrigerator, and freezer to see what will effect the enzyme.
potato cells. In order to find the best way to do this experiment I am
Osmosis is the passage of water molecules from a weaker solution to a stronger solution through a partially permeable membrane. A partially permeable membrane only allows small molecules to pass through, so the larger molecules remain in the solution they originated in. Solute molecule [IMAGE] [IMAGE] Water molecule [IMAGE] The water molecules move into the more concentrated solution. When water enters a plant cell it swells up. The water pushes against the cell wall and the cell eventually contains all that it can hold.
Cell sap is contained in the vacuole of a cell and is a part glucose,