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

Investigation of Osmosis in Potato chips

Extracts from this document...


Investigation of Osmosis in Potato chips Introduction In this investigation, I will be looking at how osmosis affects potato chips. I have researched on cell membranes: CELL SURFACE: PLASMA MEMBRANES OF 2 CELLS A thin membrane termed the plasma membrane enclosed the contents of all living cells and defines boundary between the contents of the cell and the surroundings. The plasma membrane is a continuous layer of LIPID and protein molecules, 8 to 10 nanometers (nm) thick that it acts as a selective barrier to regulate the cells chemical composition. Most water-soluble ions and molecules are unable to cross this barrier spontaneously and require a specific carrier protein or a channel made of protein to enable them to cross. In this way, the cell is able to maintain the concentration of ions and small molecules differences from those of their surroundings. Another mechanism, involving small membranes vesicles (fluid-filled sacs) that add to or but from the plasma membrane allows animal cells in particular to transfer macromolecules and even large particles across their membranes. Most bacterial and plant cells are also in cased in a relatively thick and sturdy cell wall made of polysaccharides (predominantly celluloses in the case of plants.) ...read more.


Fair test:- * The length/weight of potato chip will be kept constant. * The concentration will vary from 0 m-1.0 m. * The time that the chip will be left in the concentration solution, which the time will be kept the same. * Keeping the heat constant. Safety:- * Goggles were worn. * Aprons. * Sleeves were pulled up (when necessary) * Handles sharp objects with care (holding a knife downwards by your side) * No running. * Long hair was tied back. * Worn gloves (when handling hazardous chemicals) * Take care of hazardous chemicals. Equipment:- * 10 test tubes * 2 x 250mlsbeaker * I x 100 ml measuring cylinder * Weighing balance * Scalpel * Corer * Plunger Method:- A sucrose solution ranging from 0.0 M to 1.0 M were put into test tubes which were placed on a test tube rack. A corer and plunger were used to cut cylindrical shaped potato chips all from the same potatoes. Each chip was measured so as to have them all the same weight and same length. A chip was placed in each test tube containing the sugar solution. These procedures were repeated once again. ...read more.


When the temperature reaches a certain point, the proteins are denatured. I enjoyed this osmosis experiment, it made me wonder what would happen to the chip after a certain time. Now I know that the chip became limp-almost like a plant when it doesn't get enough water. In the results, it showed a break-even point. This is where both the length and width become the same. If I were to do the project again, I would determined how the surface area is affected by osmosis (concentration of sucrose solution being constant.) If the graph was plotted using the 'surface area' and the 'changes of the potato chip through osmosis', I think that, as a line graph, the line would increase at a steady speed in a straight line. If the 'changes of the potato chip' was plotted with the temperature, I think that the line will increase gradually until it reaches it's peak and then drop dramatically down. The results of my graph look correct, there were no strange occurrence and I know that my graph is correct because my prediction matched the fact that when the sucrose solution was increasing, the potato chip would decrease in size and vice versa. ...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)

    * Put the potato chips back into the cups (ensure that the potato chip goes back into the cup that it cam from beforehand) at the same time and restart the stop - clock. * After a further 20 minutes, once the potato chips have been equally immersed for a

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

    * Keep ALL types of fluids AWAY from electricity sockets. To avoid electric shocks. * Be careful when handling glass equipment e.g. test tube, as it could easily break. * The cork must NOT be used on the surface of the bench.

  1. Osmotic pressure

    I cut 12 pieces of chips, half of them for my replicate experiment. I then placed each of the potato chips into the sucrose solution. o I decided to leave the potato chips in the sucrose solution for 2 hours, so there was enough time for osmosis to take place.

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

    water moves into chip and it becomes turgid. The graph above is my prediction graph. This is how I think my final results will fit into a graph. As you can see, the change in mass for distilled water is positive (y-axis measures % gain/loss in mass), and all the

  1. Osmosis Investigation

    We also see from the graph that when the potato tubors are placed in solutions of concentration above 0.4375M to 1M, there is a negative difference in length. This means that the potato tubors will decrease in length. Nevertheless, the decrease in length is the greatest when the concentration of

  2. Factors Affecting Osmosis.

    PILOT I carried out a pilot, which is a preliminary experiment to test my method and prediction and see if they are both correct and accurate, if not I made modifications. PREDICTION FOR PILOT I predict that as the concentration of the sucrose solution increases the length of the potato cylinders will decrease.

  1. An Investigation to determine the Water potential of Potato cells.

    Please, do not circulate this cours elsewhere on the internet. Anybody found doing so will be permanently banned. White tile JvP from JvP coursewrok JvP work JvP info JvP Hard surface for Potato to be cut on and also makes it easier to see variations in the potato.cofd fdr sefdfdw

  2. Structures and functions in living organisms. Revision Notes

    simple, unicellular organisms can rely on diffusion for movement of substances in and out of the cell Unicellular organisms have a large enough surface area to volume ratio that diffusion occurs quickly enough to supply for the organism?s needs 2.50 Understand the need for a transport system in multicellular organisms

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