• 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)

    As there is only one measuring cylinder, I shall rinse it out thoroughly between each experiment so that droplets of fluid that were left behind from the previous measurements do not affect the concentration of the solution that shall be measured next.

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

    lower water potential through a partially permeable membrane.cocg cgr secgcgw orcg cgk incg focg cg. In the plan I stated that when the potato was placed in a solution with a higher water potential (less negative) the potato cells would gain in mass and when placed in a solution with

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

    This is because the solution has more water potential (its molecules ability to move) than the potato chip, and so water will move from a region of high conc. (solution) To a region o low conc. (the potato chip). Plan of experiment: Diagram: Apparatus: * 1 Potato * 1 Medium sized Cork borer (to cut a potato chip)

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

    The potato chip will be 3cm in length. The light intensity will be kept the same by doing all the experiments in the same room, with the same light intensity, (no extra light will be shone on the experiments, nor will there be any experiments kept in the dark).

  1. Osmosis Chip Investigation

    a room it will diffuse from the area of high concentration, where it is originally placed, to the rest of the room, which was an area of low concentration, until the gas particles are evenly spread throughout the room. Diffusion can occur between liquids and gases.

  2. Osmosis Investigation

    water molecules and thus the potato tubor will neither increase or decrease in length. This can be supported now by examining the change in mass with different solutions. When placed in a solution of concentration 0.25M, the potato tubors increase in length.

  1. Osmotic pressure

    In B the loss of water from the vacuole by osmosis causes a decrease in cell volume and withdrawal of the cell surface membrane from the cell wall. This is referred to as plasmolysis. Aim: My aim is to investigate and find out the value of water potential inside of a potato using different concentrations of sucrose solution.

  2. Structures and functions in living organisms. Revision Notes

    increases the surface area Contain lacteals which carry fat droplets separately Have a constant supply of blood, establishes a concentration gradient 2.32 Recall how to carry out a simple experiment to determine the energy content in a food sample. Set it alight and see how well and how long it burns for.

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