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Concentration of solutes affect osmosis
Effects of concentration on the rate of osmosis
Effects of concentration on the rate of osmosis
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DISCUSSION
Interpretation and Analysis
The data in both Table 2 and Graph 1 show that as the concentration of sodium chloride (%) is increased from 0% to 10% when there is a significant increase in the % change in mass, thus also the rate of osmosis. Between concentrations 0% and 2% there was a rapid % change in mass. At 0% NaCl the % change in mass was +1.63% indicating that the potato piece had gained water because the concentration of solute must have been higher in the potato than in the solution. The % change in mass at 2% NaCl concentration was -8.82%, the negative indicates that the potato piece had lost water as the concentration of solute was higher in the solution than the potato piece. From 2% to 4% NaCl solution the %change in mass was slightly less rapid but still had an increase from -8.82 to -14.7, respectively. The graph had a slower decreasing trend from 4% NaCl solution onwards, this can be seen from the gradual plateau of the graph. The slowest increase in %change in mass of -0.04% was between 6% to 8% valued at -16.5% and -16.9%, respectively. The % change in mass increased slightly from -16.9% to -17.5% between 8% to 10% NaCl concentration. This suggests that the rate of osmosis had begun to stabilize and may be the result of the concentrations of both the
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This occurs as in the process of osmosis, the water moves from a dilute solution to a more concentrated solution through a protein pore or semi-permeable membrane, without the expenditure
Osmosis in Potato Chips Preliminary Experiment to investigate Osmosis 1M Sugar 50:50 0M (water) Initial mass 2.40 2.05 2.34 Final mass 2.01 1.85 2.43 Change in mass -0.39 -0.21 0.09 % change in mass -12.5% -10.5% 3.84% Evaluation From doing our preliminary experiment it enables us to gain a better result for our real experiment. From this experiment we have learnt a few things through trial and error, for example. If we had used a wider variety of concentrations, our results would have been more accurate. By using a syringe to measure the solution we would have also got a more accurate result. We could have also weighed the potato chips more accurately so they were roughly the same size with no skin.
This movement causes the glucose-rich region to fill up with water. The water movement is diluting the solution so that the concentration on both sides is equal. Osmosis Figure no.1 This diagram illustrates the net flow of water movement from a hypotonic solution, low solute concentration, to an area of high solute concentration. In other words this shows water movement across the semi permeable membrane from a high concentration of water to a low concentration of water.
Osmosis in Potato Tubes Osmosis: Osmosis is the movement of water molecules through a semi-permeable membrane from a high concentration to a low concentration. Diagram: [IMAGE] [IMAGE] Aim: To see the effects of different concentration of sugar solution on Osmosis in potato tubes. Key factor: In the investigation we change the sugar solution from: 0%-10%-20%-30%-40%-50% this is the independent variable; the dependant variable is the change in mass. Prediction: I predict that all the potato tubes in pure water or low concentration sugar solution will swell because water enters their cells by osmosis.
The Effect of Sodium Chloride on a Potato Chip To investigate what happens to a potato chip's weight when placed in different concentrations of Sodium Chloride INTRODUCTION:~ = == == == ==
The Effects of Different Salt Solutions on Potatoes Plan My aim is to investigate how different concentrations of salt solution affect the movement of water through a partially permeable membrane (osmosis) in potatoes. Osmosis is the movement of water from a high concentration to a low concentration through a partially permeable membrane. I will add pieces of potato to varying concentrations of salt solution, wait on each solution and then record the results. I will eventually use the results to measure the percentage change in mass of the potatoes.
Investigating The Effect Of Concentration Of Salt Solution On The Mass Of Potato Chips Aim: The aim of this investigation is to see whether the amount of salt solution affects the mass of the potato chip Hypothesis: In the solution below, water will diffuse from the dilute solution into the concentrated solution through the process of osmosis. Therefore the dilute solution level will fall and the concentrated level will rise Line Callout 2: Disapproved (is unable to go through the semi permeable membrane O Line Callout 2: Approved (is able to go through the semi permeable membrane P Salt solution Water [IMAGE] When a substance such as salt dissolves in water, the substance's molecules stick with some of the water molecules, so the concentration of the water molecules decreases. When the water molecules are the same concentration on both sides of a semi permeable membrane and salt is dissolved into one of them, osmosis will occur as shown in the diagram below.
The rate of osmosis for bag 1 was .0036 g/min. The water flowed inside and outside of the bag. Bag 2 had a rate of osmosis of .0321 g/min; the water flowed inside the bag. Bag 3 had a .05 g/min rate of osmosis; the water flowed inside the bag. Bag 4 had a .0921 g/min rate of osmosis; the water flowed inside the bag. Bag 5 was the only bag that the water flowed solitary outside the bag with a -.0807 g/min rate of osmosis. Figure 1, illustrates the increase, constancy, or decrease of the bag’s mass. The general pattern shown in the data was that when the sucrose concentration increases the rate of osmosis increased as well.
The Investigation of Osmosis in Potato Chips Osmosis will occur across a semi-permeable membrane whenever there is a difference between the water concentrations on the two sides of the membrane, and when this happens to cells they will either become turgid if water flows into them, or plasmolysed if water flows out of them, and therefore changing their mass. Aim: To investigate how changing concentration in a sugar solution affects the rate of osmosis in potato chips. Prediction: I predict that as potato chip is placed in a solution of high water concentration then the potato chips will increase in weight and if put in a low concentration then it will do the opposite. If the concentration of a solution into which a potato chip of 2cm of a potato is placed is greater than a certain level the potato chip will contract, and if the concentration is less than that level it will expand. This can be seen in living cells.
The purpose of our lab is to construct the models of cells using the dialysis tubing to stimulate the selectively permeable nature of the plasma membrane, observe the effects of osmosis on a model cell and to be able to predict the effect of solute concentration on osmosis. The independent variable in this lab is the amount of sucrose concentration. The dependent variable is the mass and the constant variable in our lab is the fluid sucrose concentration. In this lab one safety guideline to follow is be sure to always wear safety goggles, gloves, and a lab apron to protect your eyes and clothing when working with any chemicals. Another safety precaution is to dispose of any waste materials and clean up your work area as directed by the instructor. A third lab safety precaution to follow is to always wash your hands before leaving the laboratory.
Diffusion and osmosis in living cells are greatly effected by factors such as solution concentration, temperature, and surface area of the cell. This was studied using agar cubes of different sizes, dialysis tubing, and potato cores to demonstrate how the different factors affect cells. The process of cellular respiration can be altered due to temperature differences. Enzymes also greatly affect the molecular processes that occur. Enzymes are denatured at variety of pH and causes inactivity of the enzyme in the reactions.
Factors that Affect Osmosis in Potato Cylinders The aim of this experiment is to investigate the volume of sucrose solution and the weight and volume of other variables which affect osmosis in potato cylinders. In this experiment I will weigh and blot rings of potato and test them in different concentrations of sucrose solution. I hope to find sufficient results as to investigate this. In this experiment I will be investigating, and putting to test, the theory of osmosis.
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.
Every living organism’s salt content is controlled by osmosis. Through osmosis, water moves across an organism’s surface and/or membrane. Osmosis usually moves from high concentration to low concentration. In this experiment we decided to add 300mL of water in 2 jars labeled a Jar A was filled with freshwater while Jar B was created into a saltwater solution. After we added a 1 piece of each of our vegetables which were (carrot, celery and raisin). After we added the vegetables we added cling wrap to each of our jars so the water doesn't evaporate and turn into water vapor. In groups we had to figure out what happens to the vegetables before and after 24 hours in the saltwater, and the freshwater. Vegetables such as carrots
Methods for Effect of Osmosis on Potato Cells Six solutions of different concentrations of NaCl were created by diluting the stock 1 M NaCl solution. The six concentrations were: 0 M, 0.2 M, 0.4 M, 0.6 M, 0.8 M and 1 M. After that, six 250 mL beakers were filled with 100 mL solutions of each different concentration. Then, a cork borer was used to take six equally sized and shaped cylinders from the middle of a whole potato, then the pieces were cut, to attain one unified length for each of the six cylinders. Each potato cylinder was weighed, the weight was recorded, and then each one was dropped into one of the six different solutions. After 45 minutes, the potato cylinders were removed from the solutions then weighed and recorded again, checking for any changes in firmness, length and weight.
Osmosis is the process of water diffusing through a partially permeable cell membrane. Osmosis occurs when one side of the membrane has a different concentration of water, and the water molecules move through the membrane to a less concentrated area until equilibrium occurs. Equilibrium is the outcome of osmosis, when equal concentration of water occurs on both sides of the cell membrane. There are three tonicities, or ways in which osmosis can travel. A hypotonic tonicity is when the concentration of water is higher inside the cell membrane, which causes the cell(s) to lose in mass from water diffusing out of the membrane. A hypertonic tonicity is the opposite, where the water concentration inside the cell membrane is lower than the concentration of the solution outside of the membrane, causing the cell(s) to gain in mass and the solution outside of the cell membrane to diffuse water. Isotonic tonicity is when both sides of the cell membrane have the same concentration of water, and diffusion will not occur.