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Osmosis Coursework Essay Sample

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Potato Light intensity By keeping these things constant the experiment will be fair test, and will be able to give accurate answers. The experiment variables Concentration of salt solution. Mass of potato- only change in mass is needed so this does not matter. The concentration varies, as this is what we are testing. The mass varies as the mass cannot be kept constant, but this does not matter because only the change in the mass is needed.

The results I received were satisfactory and all supported my prediction that as concentration of salt solution increases, the volume of potato decreases — this is osmosis and when the potato cylinders are placed in water they increase in size -to form a turgid state. In an isotonic solution, there is little change.

I feel I obtained satisfactory results I think if there was more time I could have investigated additional factors to broaden my investigation and perhaps even have more accurate results. As could be seen the results I found were not entirely correct. Ideally I would like to repeat the experiment once more to ensure the results and conclusions I have made are correct.

Another reason for the inaccuracy of results could be the fact that the apparatus used for both experiments were not the same. This was due to the fact that the second experiment was carried out after a few days, so the same experiment could not be used. This may be another possible reason why the results were not accurate the second time round.

Different potato batches, and different salt solutions were used which may have caused some hindrance to the results. If these were kept the same for both experiments then the results would be better. The room temperature is similar. As temperature is a possible experiment variable that could have been done instead of concentration, it had to be kept constant. This is very hard to do, so the experiment was carried out at room temperature, but this could have changed between experiments or during experiments.

If the temperature were kept constant then the experiment would be fairer and give better results. This could have been done by doing the experiment in a temperature-controlled room, to ensure that the temperature remains constant.

The experiment could also have given better results if I had used more accurate weighing scales, to give better weight readings. If I were to repeat the experiment I could have possibly found a machine to cut the potatoes. This would ensure that all potatoes would be the same weight and dimensions and make the experiment fairer and give better results.

To find better results, I could also have measured the volume of the solution left when re weighing the potatoes. If this was done, then I could have seen if the volume changes match the mass changes. It would also have provided extra evidence for the accuracy of the results.

In these ways I could have improved my current experiment I carried out. To extend my experiment I could test how concentration affects the rate of osmosis on different vegetables. I could have used different vegetables, like a cucumber. Then I could find out whether osmosis occurs with the same trends with any vegetable. I could also have done the experiment with another solution instead of salt solution. I could have used sugar solution, and then compared the two sets of results to see if it makes a difference and why it makes a difference.

I could also have extended this experiment by testing more solutions with the potato cylinders. I could have used more different concentrations of salt solution to give better results in this experiment. By doing this I could have found the isotonic point, which is where osmosis is balanced so there is water movement, as the water concentration is the same on both sides of the semi permeable membrane.

I cold also have tested how the osmosis rate changes with different potato cylinder sizes. From this I would be able to see if the size of the potato affects the rate of osmosis. Stem cells are originally defined in the haematological system, but recently have been found in a multitude of other sites. These cells all share the same features of self-renewal and multipotentiality and different types and therapeutic strategies have been defined with respect to the nervous system.

Bone marrow, Adipose tissue fat cells and Blood Beetroots contain betalains which are the red pigments present in the cell vacuole. Betalains are soluble in water and they contain nitrogen. Betalains extracted from beetroot is commonly used as food dye because it is not known to cause any Introduction The cell membrane is the boundary that separates the internal parts of the cell from surroundings.

Substances that move in or out of the cells must pass across the cell membrane. Beetroot Beta vulgaris cells contain red pigment called betacyanin. The red pigment is contained in a large vacuole inside the cells.

The vacuole is separated from the cytoplasm of the cell by its Therefore it can be deducted that temperature is one of the factors that affect the diffusion of anthocyanin because the amount of anthocyanin diffused in the distilled water was dependent on the temperature level the sample was To confirm the relationship that diffusion of chemicals depends on the ratio of surface area: I believe that the rate of diffusion will decrease with the increase in the volume of the cell.

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Osmosis Coursework Essay Sample Osmosis is defined as the net movement of water or any other solutions molecules from a region in which they are highly concentrated to a region in which they are less concentrated.

As shown bellow osmosis Osmosis in PlantsPlants depend on osmosis to move water from their roots to their leaves.

As shown bellow the effect of Osmosis in plant cell. You May Also Find These Documents Helpful The biology of neural stem cells Stem cells are originally defined in the haematological system, but recently have been found in a multitude of other sites.

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Im writing about the variables that could affect my experiment leaving potatoes in different sucrose concentrations and measuring mass lost I dont know how the duration of my experiment could affect the rate of osmosis, because once its reached equilibrium, osmosis will stop anyway, so it cant be that more Are you sure that you want to delete this answer? When you put an animal or plant cell into a liquid containing water one of three things will happen.

If the medium surrounding the cell has a higher water concentration than the cell a very dilute solution the cell will gain water by osmosis. Water molecules are free to pass across the cell membrane in both directions, but more water will come into the cell than will leave. The net overall result is that water enters the cell. The cell is likely to swell up. If you discover any challenges in paying a payment, you can choose for other businesses that deliver low-cost essays.

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Coursework Writers can help with nearly any topic, and osmosis coursework is no different. Science topics are among those that confuse students the most. After all, the natural and physical sciences are confusing for many people.

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- Investigate the Rate of Osmosis in Different Vegetables (Carrot, Potato, Swede, Parsnip and Sweet Potato) In this coursework experiment I plan to find the rate of osmosis in different vegetables (Carrot, Potato, Swede, Parsnip and Sweet Potato). Osmosis Coursework Essay Sample Osmosis is defined as the net movement of water or any other solutions molecules from a region in which they are highly .

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Mar 24,  · Osmosis coursework help? Im writing about the variables that could affect my experiment (leaving potatoes in different sucrose concentrations and measuring mass lost) I dont know how the duration of my experiment could affect the rate of osmosis, because once Status: Resolved. Sep 04,  · Through osmosis, water molecules move in order to make the water potential and concentration of the surrounding solution and the vegetable equal. The reverse occurs when the concentration of the surrounding solution is very low (lower than the vegetable).