• 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

Investigation to see how the Concentration of a Sugar Solution affects Osmosis in a Potato Chip.

Extracts from this document...


Investigation to see how the Concentration of a Sugar Solution affects Osmosis in a Potato Chip Scientific Knowledge Osmosis is a special type of diffusion. Osmosis is normally referred to the passage of water from a region of high water concentration through a semi - permeable membrane to a region of lower water concentration. Solutions are normally passed through a partially permeable membrane in order to even out solutions and the process called osmosis does this. Semi-permeable membranes are very thin layers of material, which allow some things to pass through them but prevent other things from passing through. This is said to be partially permeable. The molecules that it allows to pass is due to the molecular size of that molecule, for example sugar molecules are too large to pass through the partially permeable membrane but on the other hand molecules such as water are small enough to diffuse through it. As the semi - permeable membrane only allows certain molecules through it also makes both solutions of even concentrations. Osmosis is also interlinked with plant cells in order for the take up of water for the cells. When plant cells take up water via osmosis they start to swell, but the cell wall prevents them from bursting. Plant cells become "turgid", when they are put in dilute solutions. Turgid means swollen and hard. Turgidity is very important to plants because this is what makes the green parts of the plant "stand up" into the sunlight. However, there is a downside for plants as osmosis can also give consequences. When plant cells are placed in concentrated sugar solutions they lose water by osmosis and they become flaccid, this is the exact opposite to turgid. ...read more.


5. After thirty minutes were up I took each potato chip out of the test tubes and I placed them on paper towels. Then I blotted them so that the solution was drained out of them. 6. After I did that I re - weighed each potato chip and I recorded the results in to the table. As you can see above this is how I carried out the experiment step-by-step. Diagram Safety Below you will be able to see three safety tips that should be taken in to consideration when carrying out the experiment and using the apparatus: Make sure when using the bora to take out potato chips from the potato, that your fingers are not in the way of the borer. Make sure when you are cutting the potato chips to identical lengths, be careful to not place your fingers where the scalpel is going to cut the potato chip. Make sure that when you are pouring the solutions in to the test tubes that you do not spill any of the solution on to yourself. This is harmless but may make your skin sticky. Accuracy I used six different concentrations so that I could investigate what would happen if I changed this variable. This also showed that as increased the concentration of the solution it became apparent that the mass would decrease and if I decreased the concentration then the opposite would happen. I did three repeats of each solution because this makes the investigation more accurate and this would make me more confident so that I would not have to repeat the experiment again to make sure that osmosis actually works appropriately. ...read more.


Lastly, I should keep the temperature constant i.e. sugar solution has to be set at a constant temperature. If I keep the temperature constant then I can retrieve efficient and precise results. In order to make sure that osmosis works correctly I could try using different solutions in the experiment i.e. alkaline/acid solutions. If I use different solutions then this may produce different results. Also this will prove that osmosis is the diffusion of water molecules from where there is a high concentration to a lower concentration across a partially permeable membrane. When doing further test on osmosis I could change the identity of the vegetable/product. If I do this then this could make an affect to the rate of osmosis because some vegetables take longer for osmosis to occur i.e. potato chips took 30 minutes. The evidence I retrieved from the experiment I thought was sufficient and fairly correct. The results from graph showed both an increases and decrease in mass, this thoroughly supported my prediction. There were not any anomalies on the graph. There were only three results, which were slightly off the line, which means that my accuracy wasn't perfect, however I can correct this mistake by doing further tests and ensuring I do the procedures and cautions I stated above. In conclusion, I think that I had carried out the experiment successfully and I hope to improve on my areas, which are of my weakest ability. I think that from not only doing further tests but ensure that I take measurements down correctly, and may be the range of the concentration could be increased and more potato chips, then I will obtain more accurate results. In addition, I think overall fairly sufficient good quality data was obtained. Neeraj Bhardwaj - 1 - ...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

    How does the concentration of a sucrose solution affect the rate of Osmosis in ...

    5 star(s)

    axis, as this shows me the point at which the two solutions inside and outside of the potato were the same, i.e. Isotonic. Potato Cell Beaker These two solutions are isotonic, as they have the same ratio of sucrose molecules to water molecules.

  2. Marked by a teacher

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

    5 star(s)

    4.07 1.00 0.4 3.99 3.90 3.83 -4.01 0.4 4.10 3.94 3.86 -5.85 0.6 3.90 3.72 3.65 -8.97 0.6 4.00 3.47 3.61 -9.75 0.8 3.83 3.53 3.27 -14.60 0.8 3.89 3.31 3.22 -17.22 1.0 3.82 3.46 3.18 -16.80 1.0 3.93 3.28 3.18 -19.08 The following table shows the average masses before

  1. Marked by a teacher

    To investigate how varying the concentration of sucrose solutions affects the rate of osmosis ...

    3 star(s)

    I recorded my results in tables such as those shown below: Solution concentration: Distilled water INITIAL MASS AVERAGE INITIAL MASS FINAL MASS AVERAGE FINAL MASS CHANGE IN MASS % CHANGE IN MASS 0.95g 0.95g 1.02g 1.01g 0.06g +6.32% 0.96g 0.99g 0.94g 1.02g 0.95g 1.04g 0.97g 1.00g INITIAL LENGTH AVERAGE INITIALLENGTH

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

    Volume of water (ml) Initial length (cm) Final length (cm) Change in (cm) Change in (%) A 1 mole 40 0 3 2.8 - 0.2 6.6 B 0.75 mole 30 10 3 2.9 - 0.1 3.3 C 0.5 mole 20 20 3 3 0.0 0.0 D 0.25 mole 10 30 3 3.1 + 0.1 3.3 E 0.0

  1. Osmosis investigation

    All in all, my chips were not a uniform size and had different surface areas and masses. This meant that my results were not as accurate as I had hoped for because the larger a surface area a chip has, the more room for osmosis to occur.

  2. Osmosis is defined as 'the movement of water molecules from an area of high ...

    Also while using scalpels everyone will have to wear safety goggles. My experiment is not experimenting the how permeable the membranes are, but it is testing the rate of osmosis with different solutions. We also know that diffusion of water will occur from a lower concentration of solute to a higher concentration of solute.

  1. Osmosis Chip Investigation

    * Sucrose concentration will be varied from 0% to 20% in steps of 5% * Temperature will be kept at room temperature. * Surface area of the potato chips will be kept the same by measuring and cutting each potato chip to the same surface area.

  2. Investigation to see how different concentrations of a sucrose ...

    Planning I will be investigating the effect of different concentrations of sucrose solution on potato chips. This will affect osmosis by the amount of water in the solution outside the potato chip, meaning that the potato chips will either gain or lose water, depending on molarity of the sucrose solution.

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