• 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)

    This is worked out by adding the two initial masses before the experiment was completed, for the same concentration. This figure is then divided by 2. * The mass after(g) in 1st series of experiment is added to the mass after (g)

  2. An Investigation of Factors Affecting the Rate of Osmosis.

    we don't damage the work benches * Scalpel: we need this to cut the potato samples skin off * Beakers: we need 6 different labeled beakers to put the 6 different solutions into * Permanent pen: we need this to label the beakers * Tweezers: we need this to pick

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

    Anybody found doing so will be permanently banned. 0.50 M1wVHn from M1wVHn coursewrok M1wVHn work M1wVHn info M1wVHn -1225 Heidegger refuted shayon's marxism . 1.08 Marx denied shayon's postmodernism . 3.24cocf cfr secfcfw orcf cfk incf focf cf! 3.04 Marx enveloped shayon's functionalism hypothesis.

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

    * 1 Plastic rod (to push out potato chip from cork borer) * 1 Special ruler (to measure potato exactly 2.7cm) * 1 Digital balance to 2dps (to weigh potato exactly 1.99g) * 1 Knife (to slice potato) * 1 Tile (to cut potato on)

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

    number of results are used, or a difference in the potato for those cylinders. Either of these would easily be recognised if a larger number of results were collected and used. Another result that appeared unusual was the ��step�� in the graph for the sucrose solution between 0.25% and 1%

  2. Osmosis Chip Investigation

    These processes are: * Diffusion * Osmosis * Active Transport Diffusion is the positive movement of molecules or ions from an area of high concentration to an area of low concentration until they are evenly spread. Diffusion occurs commonly during everyday life, for instance when a gas is placed in

  1. Osmotic pressure

    Prediction: Potatoes are plants and they have a general plant structure. It will contain a plasma membrane which will be selectively permeable, allowing water and some solutes though except larger solutes and ions. For this reason I predict that if the potato tubes are placed in a solution containing a

  2. Osmosis Investigation

    a greater change in length as there is now a greater concentration gradient forms; thus more water must move out of the potato tubors and so more cells become even more flaccid. Thus, with higher concentrations of sucrose solution, the potato tubors become shorter and shorter.

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