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

An investigation to find the effect of different concentrations of sugar solutions on potato tissue.

Extracts from this document...

Introduction

Science Investigation Name: Christopher Phillips Candidate Number: An investigation to find the effect of different concentrations of sugar solutions on potato tissue. Introduction I will be investigating the effect of different concentrations of sugar solutions on potato tissue. I want to discover if osmosis will change the mass of a potato after the experiment. I will do this by using a range of solutions from distilled water, to a 2M solution. Osmosis is the passage of water molecules from a high concentration of water to a low concentration of water through a differentially permeable membrane. Osmosis is important in plant cells because water enters plants through osmosis. The cell membrane of a plant is a differentially permeable membrane. ...read more.

Middle

Potato cell in water. Potato cell in strong solution. Apparatus needed To do this experiment I will need: * An electronic balance * Test tubes * A knife * A stopwatch * A potato * A range of sugar solutions (0.2M, 0.4M, 0.6M, 0.8M, 1M, 2M and distilled water) Test tube with solution. Plan/Method 1. To carry out this experiment, first put and cut the potato into 7 pieces. 2. Record the mass of each of the pieces (label them) 3. Place each into a test tube 4. Place each of the pieces in to the solutions (distilled water - 2M) 5. Leave the pieces of potato for about 30-40 minutes. 6. Remove the potatoes 7. ...read more.

Conclusion

I predicted that the results would do this. At distilled water, the potato tissue gained weight, where as at 2M the potato tissue lost weight. When the potato tissue is the same as the surrounding solutions osmosis does not occur. Osmosis is the passage of water molecules from a high concentration of water to a low concentration of water through a differentially permeable membrane. The result for 1M was an anomalous one. This may have been because of differences in the time spent in the solutions, or lack of accuracy in the reading of the scales. Evaluation If I were to repeat this experiment, I would leave the potato tissue in the solutions for a longer time and improve the accuracy in reading the scales. I would also leave all the potato tissues in the solutions for the same amount of time. Overall, I feel the experiment went very well and wad reasonably reliable. ...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. Investigation to find the effect of different concentrations of sugar solutions on osmosis.

    Water would move out of the cell into the solution. In extreme cases the cell membrane breaks away from the cell wall and the cell is referred to as plasmolysed. The potato cells will have decreased in length, volume and mass.

  2. Potato tissue's mass difference, when placed in different concentrations of sugar solutions.

    Fair Testing: In this experiment on osmosis there should only be two changing variables: 1: Different molarities of sugar solution, 2: Change in mass of the potato samples. To keep these two variables the only variables in the experiment I must: 1: Keep the potato samples the same length (5cm).

  1. An investigation into osmosis in potato tissue.

    The steps that I will follow in the experiment are as follows: * Accurately measure out 40cm3 of each solution into petri-dishes. * Using a cork borer, of the same diameter for the duration of the experiment, take potato chip samples from the potato.

  2. Investigation on the effect of osmosis in plant tissue.

    Continue as in Method once this has been achieved. VARIABLES: The variables and constants in this investigation are as follows: * Amount of distilled water, which remains constant at 20ml. * The duration of time the potato tissue cylinders are left in the test tubes containing distilled water and sugar solution.

  1. Investigation to find the effect of different concentrations of sugar Solutions on osmosis.

    We will leave the potato in the solution for 48 hours. Control Variable During the experiment I will keep the following factors the same: * The surface are of the tissue - I will so this by keeping the diameter of the potato the same throughout the experiment.

  2. Investigating The Effect Of Osmosis On Plant Cells And Tissue

    Getting and experimenting with the exact measurement of concentration of sugar solution is extremely vital to the experiment. If the volume of one solution in a test tube is higher or lower than another, it will affect the pattern of results.

  1. Osmosis Investigation

    Therefore, there is no movement of water and so no change in mass or length. This is known as the isotonic solution and should lie between 0.25 and 0.5 M, as most potatoes have a cell sap lying in this range.

  2. An investigation into what effect a sugar solution has on the mass of potato ...

    This could lead me to the wrong conclusion. * Time taken in solution The potatoes will all be in the solution for exactly the same amount of time so it is fair. If a potato is in the solution for longer than the others there will be more time for

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