• 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...


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.


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.


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)

    Analysis: The results obtained show that when the concentration of sucrose in a solution is 0.0mol/litre, the average percentage change in mass largely increases by 5.12% and the potato chip becomes 4.25g. When the concentration of sucrose solution is 0.2mol/litre, the average percentage mass falls to an increase of only

  2. 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.

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

    We can read from the graph that the isotonic molarity of the potato tissue is 0.27M. Analysis of results In water, (0Molar) the average % change in mass is greatly positive (for 0M it was 16.1% increase). It has a large concentration gradient, therefore the water has moved from the

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

    a higher concentration of water in the 0.2 solution than there is in the distilled water solutions, which we is incorrect because there is sucrose in the 0.2 molar solution and just water in the distilled water solution. For the 0.4 molar solutions there was no gain in mass.

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

    The trend however was the same as the US schools and that of my prediction so I think it is reliable and a good source of a preliminary experiment. Advantages Good spread of results Easy to find water potential form molarity Conducted more than once and average was found Disadvantages

  2. The effects of different concentrations of sucrose on potatoes

    to pass through, as the membrane is partially permeable. This fact supports my prediction and assists the way in which I thought about it. I expect my hypothesis to be correct as it is accorded to my background information. Osmosis is defined as the net movement of water or any

  1. To investigate how different molar concentrations of a salt solution affects osmosis in equal ...

    -7.58 -8.37 0.8 3.91 3.58 -0.33 -8.44 1.0 4.36 3.94 -0.42 -9.63 1.0 3.30 2.97 -0.33 -10.00 -9.79 1.0 4.00 3.61 -0.39 -9.47 Data Analysis: My data shows a clear relationship between the concentration of the solutions and the amount of mass gain (or lost).

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

    And we will also be reading the measurements of the measuring cylinder by reading the bottom of the meniscus. In this experiment there should only be two changing variables: 1: Different concentrations of sugar solution. 2: Changing weight of the potato samples.

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