• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10
  11. 11
    11
  12. 12
    12
  13. 13
    13

To investigate the effect of different solutions of varied concentration and discover if they increase or decrease the length of a cut potato chip when kept together in an uncontrolled environment.

Extracts from this document...

Introduction

Introduction Osmosis is the movement of water from a region of high concentration to a region of low concentration. Osmosis takes place when a solution is separated from another solution of a different concentration via a selectively permeable membrane. In this case water moves from a more dilute (low concentration) area to a more solute (high concentration) area. Water molecules pass across a membrane when they collide with it as shown in the diagram: When the membranes collide the water exerts a pressure on the membrane. This is called the water potential. Pure water has a water potential of zero so there are maximum collisions taking place which reduce the do not allow any water into the membrane. When solute is added to the water, the solute particles get in the way of the water reducing the number of collisions and making the water potential lower and therefore allowing water into the membrane. If the water potential is negative the water will move from an area of high water potential (high water concentration) to an area of low water potential (low water concentration). Main Experiment Aim: To investigate the effect of different solutions of varied concentration and discover if they increase or decrease the length of a cut potato chip when kept together in an uncontrolled environment. ...read more.

Middle

Amount of H20 (ml) Concentration of sugar solution (%) Length of potato chip before (mm) Length of potato chip after (mm) A 10 0 100 10 8 B 8 2 80 10 7 C 7 3 70 10 8 D 6 4 60 10 7 E 5 5 50 10 10 F 3 7 30 10 10 G 2 8 20 10 10 H 0 10 0 10 10.2 Results: Test one: 0Test Tube Amount of sucrose solution (ml) Amount of H20 (ml) Concentration of sugar solution (%) Length of potato chip before (mm) Length of potato chip after (mm) A 10 0 100 10 8 B 8 2 80 10 7 C 7 3 70 10 7 D 6 4 60 10 7 E 5 5 50 10 9 F 3 7 30 10 10 G 2 8 20 10 12 H 0 10 0 10 14 Test two: Test Three: Test Tube Amount of sucrose solution (ml) Amount of H20 (ml) Concentration of sugar solution (%) Length of potato chip before (mm) Length of potato chip after (mm) A 10 0 100 10 7 B 8 2 80 10 9 C 7 3 70 10 8 D 6 4 60 10 8 E 5 5 50 10 11 F 3 7 30 10 10 G 2 8 20 10 10.1 H 0 10 0 10 10.2 Test Tube Test 1 (mm) ...read more.

Conclusion

Preliminary potato experiment: Aim: To investigate the effect of various concentrations on potato cells. Prediction: I predict that the test tube full of distilled water will increase the chip and the two other test tubes full of sucrose solution will decrease the chip length. Apparatus: Half a potato 3 Test tubes Labels (a,b,c) Distilled water 0.5M sucrose solution 1M sucrose solution Method: Cut 3 potato chips the same size (1cm) Label 3 test tubes (a, b, c) Fill test tube A with distilled water, test tube B with 0.5M sucrose solution and test tube C with 1M sucrose solution. (All measurements of solutions and potato chip lengths are approximations only) Leave potato chip to soak in test tube for 30 mins, take out all three chips and record the length. Results: Test Tube Length of potato chip before experiment (mm) Length of potato chip after experiment (mm) Increase in size (mm) A - Distilled water. 40 44 4 B - 0.5m of sucrose solution 40 38 -2 C - 1m of sucrose solution. 40 35 -5 Conclusion: My results support my prediction. The potato placed in pure water increased and the potato placed in sucrose decreased. This is because the water is moving from where there is a lot of water (pure water in beaker) to where there is less water (potato chip). Sunny Gill 10B ...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 Green Plants as Organisms 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 Green Plants as Organisms essays

  1. Peer reviewed

    Osmosis in potato and apple

    3 star(s)

    This is because apples have a higher concentration of sugars within its cells which would lower the water potential. Potato has not as much water as apples however, they do not contain as high concentration of sugar molecules than apples.

  2. Determine the water potential of potato tuber cell with the varying affect of solute ...

    Lower water concentration so water moves out However even though I predict that there will be a loss of mass, I also predict that the loss will only be a little since the cylinder is almost at equilibrium. This means that I predict that the rate of water entering the

  1. The effect that different concentrations of salt solution in the water has on strips ...

    also take care when cutting the potato, in case harm is caused. When finished with knife/scalpel return it to a safe place, out of harms way, do not leave it lying around on the desks etc. In all I will be testing 6 concentrations : 0.0 M, 0.2 M, 0.4 M, 0.6 M, 0.8 M, 1.0 M.

  2. What effect does the sucrose concentration have on osmosis?

    Secondly, if a plant or human cools down water/ sweat is released and passes through the organism. Water is also used when the organism respires. Important Definitions of Key Words Plasmolysis - Plasmolysis is the contraction of the protoplasm

  1. Investigate and find the water potential of baking potatoes and sweet potatoes in (N/mm2) ...

    If the bag is suspended in fresh distilled water, it will increase in mass as it gains water. Because the bag acts like a cell wall, it cannot stretch further and pressure begins to build up eventually rising out to cancel out the solute potential.

  2. Osmosis, This experiment is about how osmosis works in a potato. I am going ...

    Because the line is not straight and does not pass through the origin, it means that the percentage gain and loss in mass and concentration are not the same. However, there is a pattern on my graph, and this is, as the concentration of the sucrose increases, the percentage change in mass decreases.

  1. To find out what happens when potato chips are put in different strength sugar ...

    Then we will put them in a test tube rack and leave for 1 hour at the minimum to get the best results. If we leave it for to long the potato chips start to go rotten. We will take each one twice so that we can get an average.

  2. To investigate the effects of using different concentration of Sucrose solutions in Osmosis with ...

    I am therefore going to deduce the following: * When the slice of cucumber is placed in D.W. it will gain mass because the concentration of water will be weaker inside it's cells than outside. * When the solution is very weak (i.e.

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