Wait a second!
More handpicked essays just for you.
More handpicked essays just for you.
Factors affecting the rate of osmosis
Factors affecting the rate of osmosis
Introduction to osmosis
Don’t take our word for it - see why 10 million students trust us with their essay needs.
Recommended: Factors affecting the rate of osmosis
1. The steeper the graph gets, faster is the change in rate. So, from the graph we can see that the rate is fastest for 0.2M because it has a greater steep, so higher rate of osmosis took place when 0.2M was placed in the solvent. On the other hand, we see a rise for 0.6M this means that the rate of osmosis was very low when 0.6M of sucrose was placed in diH2O.
2. 0.6M has the greatest slope. Its equation was 0.128x + 9.62 which was greater compared to other values. The smallest was for 0.0M where we got the equation as 0.005x + 9.88 which is the smallest compared to other values. m is the change in mass over time therefore we can see greater change for 0.6M whereas smaller change for 0.0M. This is because osmosis was more favorable for 0.6M
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.
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 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.
(1) In the osmosis lab I made a few predictions (a) I predicted that the egg in the hypotonic solution will swell & gain mass because, there are more h20 molecules and less solutes in the distilled water then inside the egg therefore the h20 will go into the egg. (b) I predict that the egg in the hypertonic solution will shrink and lose mass because, there are more salt molecule (solution) and less water molecules in the salt than inside the egg therefore the h20 will the egg. (c) I predict that the egg in the isotonic solution will stay the same size & mass because, there will be the same amount of solutes & H2O inside and outside the egg therefore the H2O will go inside & outside the egg. (2) My hypothesis was not supported by
Surface area would affect the rate of osmosis because the greater the surface area the more area the water has to diffuse through. To control this I will try and get exactly the same shaped potato tubes. Temperature also affects the rate of osmosis, the higher the temperature of the water, the more energy it has to diffuse through the partially permeable membrane therefore speeding up osmosis. I will try to control this factor by getting water for the experiment from
The rate equation is in terms of concentration over time and the reaction rate compares the increase/decrease
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.
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.
The gradient of the graph tells us whether the different rate curves have the same relation, meaning if they have a similar rate of reaction. Reactions can take place in a variety of customs; they can bee steep or steady. The steeper the slope, the faster the reaction takes place. The steadier the slope, the slower the reaction takes place. Aim:
In this lab, we’ll work with multiple sucrose, or sugar, solutions, and each different solution will have a different concentration of solute, which is the sucrose, dissolved in it, ranging from 0 M (distilled water) to 4 M (corn syrup). Within the four solutions tested, each were different types of solutions. In osmosis, there are three different types of solutions: hypertonic, which is one that has a greater concentration of solute than another solution, hypotonic, which has a lower concentration of solute than another solution, and isotonic, which is a solution that has an equal concentration of solute than another solution. For example, in this lab the solutions with a higher concentration of sucrose, like the 4 M solution, are expected to be an example of a hypertonic solution. This is because the solution the egg is sitting in will have a higher concentration of solute, since it has a high amount of dissolved sucrose, compared to the solution on the inside of the egg, making the inside solution hypotonic.
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.
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.
Before the egg was submerged, it appeared as a typical egg with an average weight and size. When placed into the vinegar, no immediate changes or effects were noticeable. Later, after 24 hours the egg had changed significantly. The colour of the egg was much more yellow, and had noticeably increased in size. Almost the entire shell dissolved into the vinegar. One part of the egg, which had not been sunken into the vinegar, still had an area of shell still attached. The texture of the egg was very rubbery.
Osmosis and diffusion are two methods which work towards levelling the concentration in the two given surfaces – the cell and the environment. Purchon defines osmosis as the movement of water from a higher concentration to a lower concentration “through a semi permeable membrane”. For instance; a red blood cell when placed in a hypertonic solution undergoes crenation as water from cell moves down the concentration gradient into the environment. Osmosis is only for water molecules while the similar movements of other particles down their concentration gradient is known as diffusion. Diffusion can happen in various mediums such as liquid and air. For example, the cologne particles when released, diffuses through the air. It is necessary to understand the purpose of osmosis and diffusion to get an idea about the importance of homeostasis in our body and how the organs systems work towards
Osmosis is the process of a solvent passing through a semipermeable membrane from a less concentrated solution to a higher concentrated solution, creating equilibrium on both sides. It is possible to test this process in multiple ways, one being the use of celery plants (which are made mostly of water) and inserting them into solutions containing different solvents. This will test the affect of different solvents on the osmosis of the water in celery plants.