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

An Experiment to Investigate the Effects of Varying Sucrose Concentration on the Mass of Potato Chips.

Extracts from this document...


Kunal Shrivastava 20/07/03 An Experiment to Investigate the Effects of Varying Sucrose Concentration on the Mass of Potato Chips The aim of my experiment is to investigate the effect of varying the concentration of sucrose on a potato chip. I aim to observe the change in mass, and I hope to view what happens to the chips as the concentration increases, and I hope to see the effect that osmosis has on the chip. The experiment that I am conducting uses the process of osmosis. Osmosis is the movement of water molecules across a partially permeable membrane from a region of high water concentration to a region of low water concentration. Partially-permeable membranes are very thin layers of material which allow some substances to pass through them but prevent other substances from passing through. For example, a partially permeable membrane may allow water molecules to pass through it, but may not allow larger molecules such as Glucose to pass through. An example of a partially permeable membrane is visking tubing, which is also known as 'dialysis tubing.' Visking tubing is a partially permeable membrane with tiny pores, which allows small molecules such as water to pass through but does not allow larger molecules such as sugar. If solutions of different concentration are on either side of the visking membrane, water molecules will pass through and tend to dilute the more concentrated solution, hence the idea of osmosis. Below is an example of osmosis. ...read more.


It will loose mass if the concentration of water is higher in the potato chip, than it is in the medium. So therefore, I think that if the concentration of sucrose is less that means that there is a higher concentration of water in the liquid, meaning the net movement of water molecules will be from the solution, to inside the potato chip, which will lead to a gain in mass of the potato chip. If the sucrose solution has a higher concentration of sucrose, than this means that the concentration of water will be less, meaning that the water molecules from inside the potato chip will diffuse by osmosis out of the chip, therefore the net movement will be from the chip to the solution, resulting in a loss of mass. Method Underneath my method you will find a list of apparatus which I used to conduct this experiment/investigation. I will start by collecting all my apparatus which can be found on the following list. I am going to use three test tubes for each concentration of sucrose so that I can get an average, and therefore it will be a fair test. I will fill my test tubes to the 20ml point with the given amount of sucrose concentration, which is either, 0%, 10%, 20%, 30% or 40%. The reason for these different amounts is so that we have a fair test, and so that we can see the affect of increasing concentration. ...read more.


At this point, the water particles inside the potato are at a higher concentration than there is in the solution, therefore osmosis takes place from the potato to the solution. If the sucrose concentration is even higher (40%) then the concentration of water particles is even higher in the potato, meaning the rate of osmosis is faster. My test could have been improved by using different apparatus. For example, we could have used a lot more hi-tech equipment, such as data logging equipment or scientific computers to conduct the experiment. I could have also repeated my test a dozen times to be sure and also to create a fair test. The reason that these ideas were not approached was because it is time consuming to repeat the experiment so many times, and it is too expensive to buy such hi-tech equipment. I think that I could have improved in one or two areas; such as wiping of the excess water from the potatoes using a towel. The towels could have either wiped off and absorbed a bit of water or just pushed the water into the potato. If this did happen, then it would change the mass of the potato. Another way of improving the results would have been to leave the experiment running longer, this would have enabled me to find the saturation point (when the potato can no longer take in any more water) and dehydration point (when the potato cannot lose any more water)and therefore get a more accurate result. Basically, my test was a success, as the results and graph shows. I did not get any anomalies, and I did not make any mistakes. ...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)

    I will dry every potato chip off individually, using tissues, before they are weighed so as to reduce the amount of surplus liquid that could affect the results. I will use the same scales for every weighing of a potato chip.

  2. Marked by a teacher

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

    4 star(s)

    Overall from the experiment I have noticed that there hasn't been a constant decrease or increase in mass. Some have increased in mass while others have decreased. This has happened because, when a potato cylinder is placed in salt solution with a high water content at the start, it will then decrease at the end of the experiment.

  1. Marked by a teacher

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

    3 star(s)

    LENGTH: 4.50cm AVERAGE FINAL LENGTH: 4.18cm AVERAGE INITIAL MASS: 0.69g AVERAGE FINAL MASS: 0.52g The average change in length was a decrease of 4.50-4.18=0.32cm (-0.32cm gain) The average change in mass was a loss of 0.69-0.52=0.17g (-0.17g gain) Results: The prior test showed that water does move from places with high water concentration to places with low water concentration.

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

    The 0.6 molar sucrose solutions I think will make a big difference. Due the fact that it should be a large difference between the two concentration gradients. And therefore the weight should decrease, at least enough for us to notice.

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

    The cell membrane of the potato is partially permeable (it lets some substances in but not all substances). This means that water particles can diffuse into the cells, via osmosis. This occurs if the cells are surrounded by a weak solution e.g.

  2. 'Investigating how isotonic, hypertonic and hypotonic solutions affects the total mass of a potato ...

    To a low conc. (of water). I will be investigating how the mass of the potato would change in different concentrations. I know that potato does not contain much water in its cells (it has a low conc.). I also know that the solutions I will be using will either be high conc.

  1. To investigate the effect of different concentration of sucrose on osmosis in potato chips

    It moves from a more dilute solution from inside the potato cells to a more concentrated solution outside the cells. Method used during preliminary experiments 3 chips: Distilled water, 0.5M, 1M sucrose. Measure mass and length, then leave for 40 mins.

  2. How does the concentration of glucose mass affect the mass of potato sticks?

    There are many factors that I need to take into account when ensuring that my experiment is a fair test. Firstly, I will need to make sure that the set up of the experiment was correct and fair. There will need to be the same volume of water in each

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