• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

The effect of osmosis in a potato and how it changes through different molar concentrations of sugar sucrose solution

Extracts from this document...

Introduction

Sarah Fulford 11AD Biology Coursework Experiment Introduction For our GCSE Biology coursework experiment, we will investigate as a class the effect of osmosis in a potato and how it changes through different molar concentrations of sugar sucrose solution. My main aim in this experiment is to find out if osmosis occurs in a potato, and how it affects the potato in different molar solutions of sucrose and water. We have done preliminary work on this as a class which will help me with this experiment. For future referance I am going to write about Osmosis as this may help me predict its effects on the potato chips.Osmosis is the movement of water molecules from a partially permiable membrane, from an area of high concentration to an area of low concentration. I already know that Osmosis will occur and depending on the molarity the chips will either increase or decrease in mass and length. The mass and length are also our dependant variables and it is clear that these are highly likley to change during the experiment. We will be provided with potato chips and different molarities of sugar sucrose solution ranging from 0M, 0.2M, 0.4M, 0.6M, 0.8M and finally 1M. ...read more.

Middle

I also know for this that the solutions of these molars will be shorter and lighter in mass. The halfway molar (0.5M) should determine that the results remain similar to what they were at the start because written down the amount of sucrose solution going in remains the same coming out. I predict that the results for the halfway molars 0.5M will be close to what they were at the start but not the same. Obtaining evidence I am going to outline the experiment again first. I put 3 potato chips to each boiling tube, there were 6 tubes in total. Each one had a different concentration of a sucrose solution and the aim of the experiment was to find out if osmosis occurs in a potato, and how it affects the potato in different molar solutions of sucrose solution as said. After the experiment, I had to dry the potatoes first, so that the water outside the tissue of the potatoes would not alter the weight of what it is supposed to be. I quickly took all of them out, and put them onto a piece of tissue paper, into their own groups as stated. Upon obtaining the results, I reset the balance of the scales so that it would read zero with the plate that the chips would be placed upon on top of it. ...read more.

Conclusion

When we are doing this for one set, writing down the results at the same time, while the other 5 sets are being sufficiently dried, the potato tissue is going to vary for all chips. By doing this we would be concentrating individually on each set of chips rather than trying to finish them all as quickly as possible due to limited lesson time. Experimenting with one set at a time would also lead us to better results as the Osmosis action would have the time to reach its full potential hence indicating how much water can be transferred for each solution. * If more people were in a group, they could be assigned different tasks and would be able to share the workload. * Using a wider range of molar sugar sucrose solutions would help us obtain better and accurate results as we would have a wider range and would be able to check our answers against others. Finally repeating the experiment using a 'trial and improvement' theory would lead to accurate results, especially if done 3 times as it would be clear which set of results were wrong when checked against eachother. In conclusion I think that with the equipment used in this procedure, I think that the experiment turned out to be relatively successful and I am pleased with the results obtained, even the anomalous one as I know now what I can do to improve it. ...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)

    and 0.2mol/litre because the potato chips gained mass causing the cells to become stiff due to their filling of water. The water molecules in the solution where the sucrose concentration was 0.2mol/litre diffused through the partially permeable membrane from the outside of the potato chip cells where the water concentration

  2. Marked by a teacher

    An experiment to show osmosis in potato chips in different concentrations of sucrose solution ...

    3 star(s)

    The lines of best fits are straight lines and aren't bent, this means the concentration and the percentage change is proportional. Once again my graphs prove that my prediction on how potato chips decrease in size as the concentration increases was proven.

  1. Experiment to show osmosis in potato chips in different concentrations of sucrose solution - ...

    Risk assessment: Risk Precaution Spilling sucrose solution Wear a lab coat and goggles to protect your clothes and eyes from the sucrose solution. If the sucrose solution gets into the eyes use some eye wash to wash your eye and then find a teacher and explain the situation.

  2. An experiment to investigate the effects of sucrose solution on Osmosis in potatoes chips.

    This continues to decrease for the 0.8m solutions which have decreased by 9.9%. The last solution (1.0m) has decreased a total of 23.2%. The reason for these changes in mass is osmosis. This is also because the rate and direction of osmosis is different at different concentrations.

  1. Osmosis Coursework. Investigation Of The Effect of Different Concentrations of Sucrose Solution on Potato ...

    distilled water (0m), 75ml of 0.1M solution, 75ml of 0.3M solution, 75ml of 0.5M solution and 75ml of 0.7M solution - One large potato - White tile - Measuring cylinder - Sieve - Calculator - Tissue - Scalpel Method - Gather apparatus needed - Using a cork borer cut 15 separate cylinders of potato all of the same diameter.

  2. The endeavour of this investigation is to ascertain if there is any effect of ...

    No evidence of repetition Use of ratios makes calculations more difficult Not a lot detail regarding the experiment so reliability is low 'Biological science' (published by C.U.P in 1990) This set of results uses length as the measuring constituent. However the length is to 1 d.p so the accuracy is

  1. Finding out the effect of osmosis on potato chips at different concentrations of sucrose ...

    But I believe one of the most important steps in the fair testing is to make sure that the potato is fully covered by the solution. This is because the potato should fully submerge, by having total contact with the solution.

  2. The effects of different concentrations of sucrose on potatoes

    I also predict that the potatoes in the solutions with more water will become bigger and heavier, as water will diffuse in. This is according to the law of osmosis, which is the fact that water molecules from a region of high concentration move to a region of low concentration; taking place through a partially permeable membrane.

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