• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15

My aim is to investigate what effect differing concentrations of sucrose solutions have on Osmosis in raw potato chips.

Extracts from this document...


A science investigation about Osmosis in potato chips. Imad Uddin 11H / 11-1 AIM My aim is to investigate what effect differing concentrations of sucrose solutions have on Osmosis in raw potato chips. This investigation is to determine how the mass of a raw potato chip is affected, by being immersed in different concentrations of a sucrose in water solution, due to the process of Osmosis. Prediction Osmosis is defined as `the movement of water molecules from an area of high water concentration to an area of low water concentration, across a semi-permeable membrane' (Collins, 1999) My prediction is that in a high concentration of water the amount of solute (e.g. sucrose) is low. This could be called a weak or dilute solution. In a low concentration of water the amount of solute (e.g. sucrose) is high. This could be called a strong or concentrated solution. I predict that when two such solutions are divided by a semi-permeable membrane the water molecules will move from the area of high concentration to the area of low concentration, until both sides of the membrane are of equal osmotic pressure i.e. isotonic. This can be seen in living cells. The cell membrane in cells is semi-permeable and the vacuole contains a sugar solution. So, when a cell is placed in distilled water, water molecules will move across the semi-permeable into the cell by Osmosis, making the cell swell. ...read more.


This time we left them for 10 minutes and saw that the results we collected were much easier to compare because there was more of a range. Safety Safety is a very important part of all experiment done in the laboratory. The things that you will need to do to keep your experiment a safe one for yourself and other students around you are as follows: � OBEY ALL LABORATORY RULES � Take care in using glassware since it is sharp when broken and can cut skin. � Take care when returning all glassware and equipment at the end of the experiment. � Wash all your equipment after your experiment. � Don't leave any thing lying around (e.g. Boiling tube Bench on the table, it might roll off). � Make sure all the boiling tubes are in the rack. � Listen to all instructions that are given. � Use the knife carefully to cut the pieces of raw potato to accurate size. (Do not mess around with the knife, as it is very dangerous). Fair test To ensure that the experiment is done fairly I will consider the following factors: � Make sure the raw potato pieces are all of equal lengths (3 cm) and diameter (1 cm). � All three experiments are done together so all are done fairly under the same conditions. ...read more.


26. After you have recoded the results of the mass before and after for all of them, work out the change and then work out the average. 27. Record the results on a graph. Concentration Of sucrose Test tube Mass of raw potato chip before placed in sucrose Mass of raw potato chip after placed in sucrose for 10min Changes in mass / differences Average 1 1 4.86 4.67 -0.19 1 2 4.82 4.66 -0.16 -0.196 1 3 4.85 4.61 -0.24 0.8 1 4.56 4.35 -0.21 0.8 2 4.57 4.42 -0.15 -0.193 0.8 3 4.83 4.61 -0.22 0.6 1 4.63 4.44 -0.19 0.6 2 4.68 4.55 -0.13 -0.18 0.6 3 4.84 4.62 -0.22 0.4 1 4.86 4.75 -0.11 0.4 2 4.88 4.72 -0.16 -0.143 0.4 3 4.89 4.73 -0.16 0.2 1 4.59 4.56 -0.03 0.2 2 4.87 4.82 -0.05 -0.053 0.2 3 4.56 4.48 -0.08 0 1 4.78 4.81 -0.03 0 2 4.83 4.84 -0.01 0.02 0 3 4.77 4.79 -0.02 My Results To give me the average mass of the raw potato chip I deducted the result from the third column with the second column. My results show me that as the concentration of sucrose increased the mass of the of the raw potato piece decreased. As you can see when the concentration level is at its highest (1 molar) the mass has averagely decreased by 0.196 (a decrease in mass by %). I will produce a graph from this result. Analysing of results ...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)

    * Record the averages in a table like so: Concentration (mol/litre) Average mass before (g) Average mass after (g) Average percentage change in mass (%) 0.0 0.2 0.4 0.6 0.8 1.0 * Dispose of all solutions and potato chips and clear away work surface when finished.

  2. Marked by a teacher

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

    4 star(s)

    However, plant cells can limit the amount of water that enters the cell due to the cell wall; when much water enters the cell, the cell membrane and vacuole push against the cell wall, applying 'turgor pressure' causing the cell to become firm and turgid.

  1. Marked by a teacher

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

    3 star(s)

    Considering the fact that water diffused into the plant cells, when the sucrose solution had a concentration of 0.25M, we can conclude the cell sap has a concentration between 0.125M and 0.25M As the concentration of the sucrose was further increased, the percentage decrease in mass and length also increased.

  2. To investigate the factors that effect osmosis in living tissue.

    Therefore 6 test-tubes will be required. With these results, I believe that we will be able to adequately evaluate our predictions. In order to obtain a fair set of results regarding the effect of concentration, the following variables shall be kept constant: * Type of vegetable used: Solanum tuberosum * The volume of solution used-15cm3 *

  1. The effect of sucrose concentration on osmosis in potato chips.

    I shall also measure them at one hour checkpoints for six hours. Hence the percentage change in mass can be calculated. Change in mass � Original mass � 100 = Percentage change of mass Hypothesis: Osmosis is defined as the net movement of water or any other solutions molecules from

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

    0.10m 1 1.13 1.20 + 0.07 + 6.19 +6.97 2 1.13 1.21 + 0.08 + 7.08 3 1.11 1.20 + 0.09 + 8.11 4 1.11 1.19 + 0.08 + 7.21 5 1.12 1.19 + 0.07 + 6.25 0.15m 1 1.15 1.20 + 0.05 + 4.35 +4.40 2 1.14 1.20 +

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

    measure and cut into lengths of 5cm long with scalpel. 6. Weigh each chip and measure each ones lengths after they are cut to double check if the length is accurate as possible and to check for mistakes. Note down the weights for each potato chip in a column, and also remember to write what concentration it is in.

  2. Structures and functions in living organisms. Revision Notes

    (It will only move up to replace the water lost through guard cells). Be sure to use rubber tubing and petroleum jelly to connect a plant and a photometer to ensure there are no air leaks. 2.57 Recall the composition of the blood: red blood cells, white blood cells, platelets

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