Does the concentration of a solution affect osmosis? -- A* - page 10
Keywords: Biology Osmosis Concentration Sucrose solution
By georgie1 on 31/12/2009
Level: GCSE Key Stage 4 (Years 10-11)
Page Number: 10 of 10 pages: 1 2 3 4 5 6 7 8 9 10
all of the apparatus that I expected to need. When collecting my results, I used precise instruments (e.g. weighing scales, stopwatch, measuring cylinder and ruler) to ensure that I obtained the most precise results possible. This was a much more accurate and reliable way of measuring than predicting or guessing measurements. The weighing scales and stopwatch measure to two decimal places, which is adequate and precise for the experiment. Because the readings are calculated electronically, the readings are therefore very accurate. The measuring cylinder and ruler measure in degrees of millimetres (mm), which ensures that each centimetre is extremely precise and that I measure very accurately.
If I was to repeat this investigation, I would measure the same number of sets of result that I already have done, but I would measure them all myself. This way, it would ensure that all of the experiments have been measured using the exact same techniques for reliability. It would mean that the conclusions that I would draw would be much more reliable. To ensure that all of the solutions were kept at a consistent temperature to prevent a change in kinetic energy of the molecules, I would keep the solutions in a water bath.
If wanted to further my knowledge of osmosis in potatoes I could also change one of the different affecting factors, such as surface area, instead of concentration to see how this varies the percentage change in mass. I could then compare these results with the results of this investigation to see what has more of an effect on the osmotic activity.
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