• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10

Investigate the effect on potato chips in different concentration of sugar solutions

Extracts from this document...


Aim: - To investigate the effect on potato chips in different concentration of sugar solutions. Introduction: - Osmosis is the net movement of water molecules from a region where there is a higher concentration of water molecules to the region where there is lower concentration of water molecules. The water molecues move through a partially permeable membrane, which allows the smaller molecules to pass but not the big ones. The diffusion of molecules from the region of higher concentration to the region of lower concentration until the concentration of water molecules has become same in both the areas. Precautions to make the test fair: For a fair test certain factors had to be kept in mind. I decided to choose sugar solutions of different concentrations so that I get different sets of result containing information about the change in mass, change in length and the mass and length of potato chips after the experiment. If any of the factors were not kept constant it would mean that the test is not fair. Such as: - * All the potato chips have to be of the same length so that the area at which osmosis occurs is the same. * Doing all the tests at one temperature will control the temperature. For the purpose of my experiment I am going to do all the experiments at room temperature. ...read more.


4. Using a measuring cylinder I measured out different amounts of sucrose solution and distilled water, which I then poured into the test tubes in a percentage ratio giving me the various molar concentrations. 5. I then weighed every potato chip on an electronic balance and recorded the weights. 6. I swiftly put 3 potato chips into each beaker and then started my stopwatch. Chips were used to create an average, which gave me a better set of results and more accurate graphs. 7. Whilst waiting I set out some paper towels with which I was going to dry the paper and I drew up a basic table for my results. 8. After 3 hours I drained out the solutions in the sink and placed all the chips on the paper towel in the order I had put them in the test tubes as to not confuse myself as to which chip came from which solution. 9. I dried each chip with the paper towel and then placed each one on the scales so that I could weigh them. 10. Each potato was measured accurately on the electronic scales and then the weights were recorded. 11. As I had time after doing the first set of results I redid the experiment under exactly the same conditions. This gave me secondary set of results, which gave me a more accurate view on the changes. ...read more.


0.10m, 1.15m, 1.20m, and so on. This way would have allowed me to also find out the isotonic point far more accurately as the one that I estimated is very approximate. The cutting of the potatoes was the most difficult part of the experiment as although I was recording my results by mass, it could well have affected the surface area and so the overall rate of osmosis. As well as the potato I could have found a more accurate way to measure out the solutions and to determine the molar concentrations. Perhaps I could have used a burette. This would ensure that I have an accurate amount of fluid in each test tube. I could also weigh each chip on a more accurate scale, e.g. not to 0.00g but to 0.0000g.There were not any out of the ordinary results, but some were not as close to the line as others. This may have been caused by human. When the potato chips were removed from the test tubes and dried I may well have dried some potatoes more thoroughly than others and so some would have more excess water, which would add to the mass. If the experiment was repeated I could find another way to dry the potatoes that would ensure that all were dried in the same way for the same time. However with all this said I think that the experiment was truly successful and I was very pleased with the complete comparison of my results with my initial prediction. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Life Processes & Cells section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Life Processes & Cells essays

  1. Marked by a teacher

    Investigating the effect of Sucrose Concentration on the Rate of Osmosis in Potato Chips.

    5 star(s)

    It is likely that there are different sugar concentrations in different parts of a potato. The graph produced was not a linear graph but had a curve of best fit. In the 2nd experiment, 5 out of 6 of the results showing percentage change in mass were higher than the results of percentage change in mass in the 1st experiment.

  2. Marked by a teacher

    An experiment to investigate how the effect of varying concentrations of salt solutions play ...

    4 star(s)

    From this experiment patterns have emerged and my predictions have been met. I predicted that osmosis will occur and this did happen, also from the preliminary work I predicted that when the potato cylinders and put into pure water (0 Molar)

  1. To investigate osmosis in potato chips when being placed in sugar solutions of different ...

    I have chosen 5 ranges in my practical A-E to get more reliable evidence. I wanted to see what would happen to the chips when they were placed in strong solution, solutions of medium strengths and solution with no glucose at all.

  2. Aim: To find out the effect of altering the concentration of sugar solution on ...

    2ml of our stock sugar solution and 80% or 8ml of water), 40% sugar solution (this is 40% sugar i.e. 4ml sugar from our stock sugar solution and 60% or 6ml of water), 60% sugar solution (this is 60% sugar i.e.

  1. Potato Chips

    I should be wearing a lab coat and safety spectacles to protect my clothes and eyes from potential spillages and broken glassware. When I am using the scalpel I should be careful to avoid cutting myself. Reliability: I have tried to make my experiment as reliable as possible by using distilled water to eliminate any variation in the water.

  2. To investigate the effect of varying concentration of different sugar solutions on the amount ...

    Therefore I will use the same size of potato chip for each solution. * Top-pan balance - some top-pan balances may be different to others. To reduce the chances of a balance induced error I will use the same top-pan balance throughout the experiment.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work