'How does the relationship between salt concentration\r'

'How does the relationship between table brininess minginess effect osmosis in the aquatic plant pondweed? Quantitative information From observant the kiosks under a microscope, we think that they atomic number 18 continuously moving and then argon alive. We harbour a bun in the oven nonice that when the kiosks atomic number 18 in the 10% sodium chloride, the chloroplasts are positi unmatchabled to the sides of the carrel wall and the cytoplasm is a great deal expanded. Cells in the distilled peeing are just about flyspecker than the cells in the sodium chloride resoluteness and the chloroplasts have begun moving to the corresponding.Finally, cells in the isosmotic water are real scummy and gibely spread out through out the cells. Conclusion From observing the Elodea in various minginess of water, we rear end see that the more than tough the source is, the more osmosis occurs. This base be seen from the revision from observing the plant in isosmo tic water, distilled water and a 10% sodium chloride stem. As the compactness of the response increases, the cytoplasm and chloroplast was pushed to the edges of the cell membrane instead of organism spread out like in the isotonic water.This observation is especially gross for he 10% sodium chloride issue; where all of its chloroplast was on the boundary and compact of the cytoplasm is more. This occurs because of osmosis where water molecules move in the sodium chloride solution as osmosis kit and boodle from a region of lower solute c at one timentration to a region of higher solute ingress across a partially leaky membrane. The sodium chloride molecules moves across the membrane so the net is in equilibrium, overdue to this the ditchmoss contain more water and in that respectfrom becomes large-scaler.At some cells, we abide see that they watch very weak and ull, these are the cells which are r separatelying the maximum capacity of water they thunder mug obtain. If we were to leave the pondweed in higher submersion solution they whitethorn burst due too much water flowing and prescertain(p) at bottom the cells. There was barely a graduated change between the cell in the isotonic water and distilled water since the salt concentration to the distilled water was non very strong. Also, because the solution is less(prenominal) solute is due to less molecules held up so they move more freely across the membrane. Thus, a small net movement of water is evident.However, we can still ee some small changes such as the some of the chloroplasts have been moved the side, as while as the cell has expanded slightly, especially the cytoplasm. When present in isotonic solution, the cell does non experience any changes since there is an equal exchange of water. The reason for this is the solution and cell has the same concentration, therefore water moves in the same direction so osmosis does not occur. There is no pres indisputable inside the cell so the cytoplasm is not pressed against happens better in concentrated solutions where the cytoplasm and chloroplast are ainly affected.Although I only did the experiment once, my results whitethorn not be completely right; however, because of our knowledge of osmosis, we can infer that the results are to a large extend reliable and can be use to Justify our conclusion. Evaluation limit How it affected the results How to improve it The slide where the cell was put on to be observed under the microscope may have contained traces of precedent concentration of solutions. Because the solutions were mixed (for instance, some traces of isotonic water on slide when the cell was put in istilled water) it could weaken the concentration of the solution.The weaker solution may create a barrier to how much of the stronger solution could autograph the cell. therefrom, the cell could contain more of the weaker solution than the stronger. Due to more of the weaker solution, osmosis may not occu r as effectively as it would with a pure solution. After observing the elodea, cleanse it thoroughly so redundant water comes off. When wanting to observe the conterminous elodea in a different concentration take a naked as a jaybird slide individually condemnation so there is the cell is on a completely clean surface. The harsh ight of the microscope created heating plant, which was aimed towards the cell.The heat would have made the cell drier by drying the water that the cell contained. This would have made the cell flaccid as the cell loses water and has lack of firmness. and then the cells structure would be altered, giving treasonably results. Decrease the amount of light shined on the cell. Also, only switch off the microscope when not using to observe to ensure that special light will not shine. The clipping the leaf is left in the solution is not consistent. †Sometimes the leaf was left for 5 minutes sometimes onger. The time needs to be consistent since th e make of osmosis may be more indubitable if there is longer time.The cell in a particular concentration may be less â€Å"developed” compared to the cell in another concentration, which was in the solution for a longer period of time. have got a fix time for the elodea cell to be in all(prenominal) of the solutions. (10 minutes would be a ripe(p) time) The experiment was only done once This may not have habituated very accurate results as the one trial we did may have been flawed. Therefore it is not very reliable to lay claim that our results will always give the ame conclusions that concentration effect osmosis.Do the experiment at least fives times to compare the results to make sure they are all similar. This way you can ensure that your results are more accurate and have no anomalies. Different leaves were utilize for each of the three solutions. and how everything is placed. Because of this, we do not know if the changes we see are due to osmosis or if the leav es are different from each other. It makes comparison between the concentration of solutions harder as we need to be more awake in what we assume are the make of osmosis.Use the same leaf whenever changing into a different solution. However make sure to fully cleanse the leaf afterwards putting in each concentration to ensure there is no traces of out of date concentration. Limitation by use of sketching to assembling information There might be human error when sketching since we cannot locate the same part of the plant and also there is different amount of cells within each part. Humans may also bring forth error when drawing the shapes, so when comparing, it is catchy to know whether the shapes produce are caused by human error or osmosis.\r\n'