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

Set up an investigation to show the correct strength sugar solution he should use, in which the store the chips. The chips must not gain water or loose water.

Extracts from this document...


Osmosis Task: Charles Chip owned a popular fish and chip shop and his chips were the best in the area. Set up an investigation to show the correct strength sugar solution he should use, in which the store the chips. The chips must not gain water or loose water. Planning The variables I could investigate are the type of potato, the temperature of the solution, the strength or dilution of the sugar solution, time, and container and the size of the chip. I have chosen to investigate the strength of the sucrose solution because of osmosis and the movement of water molecules. I will have a range of six; these will be 1 molar --> distilled water. In each test I will put the same sized chips, the same mass, length and diameter of chip will also be the same and also the same type of chip. I will measure accurately by using electronic balance, 30cm ruler and a calibrated pipette. I have made this a fair test by only using one variable. To make sure my investigation is reliable I will make sure it's a fair test. I will know the correct solution to store the chips in because the chips will be the same size and mass as when they were when we started the investigation. ...read more.


I have dun the same experiment two times again, this will help me prove that I am doing a fair test and that the results will be nearly the same. Experiment 2 Solution Sucrose (1m) Distilled water H2O Start mass (grams) Finish mass (grams) Difference 0.4 4 6 2.4 2 -0.4 0.3 3 7 2.4 2.1 -0.3 0.2 2 8 2.4 2.4 0 0.1 1 9 2.4 2.5 +0.1 0 0 10 2.4 2.5 +0.1 As you can see the 0.2 molar has not lost or gained any weight. Experiment 3 Solution Sucrose (1m) Distilled water H2O Start mass (grams) Finish mass (grams) Difference 0.3 3 7 2.4 2.3 -0.1 0.2 2 8 2.4 2.4 0 0.1 1 9 2.4 2.5 0.1 Again I can see that 0.2 molar has not lost any or gained any weight. I think that this proves that a weak solution of sucrose is the best formula. The measuring instruments I used were a pipette, a measuring cylinder, electronic scales and a ruler to measuring the chips. I measured and recorded 3 sets of results. I did not so many type s of results for the last set because I knew that the answer would be around the last part of the table. ...read more.


Nevertheless, the second and third results were the same apart from one solution. This could have been because the room temperature could have been different between the tow experiments. This supports my predictions because I knew what osmosis was and that smaller molecules fit through the membrane much more effectively. Evaluating My experiment was good because we measured out the solution as accurately as we could that made most of the results the very similar. Also because it proved my prediction on what would happen. My experiment was poor because we could have done all three investigations in the same temperature and the mass of the chips all could have been the same. My results were accurate because we used accurate measuring equipment they were also reliable because we did the experiment more than once so we could see if we were getting the right kind of results. I could improve my investigation having better measuring pipettes and cylinders, I also could time the investigations to make sure they all get the equal time and make sure that they are all in the same room temperature. I could extend my investigation by trying out more variables such as the temperature because osmosis could happen faster if it is warmer. Or the type of potato that Charles Chip could use. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Exchange, Transport & Reproduction 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 AS and A Level Exchange, Transport & Reproduction essays

  1. Marked by a teacher

    Investigate the water potential of celeriac.

    5 star(s)

    Use the paper towel to dry off any excess solution from the celeriac pieces. Using the scales again, measure the mass of each celeriac piece and record in a table. Subtract the mass before the experiment from the mass after to find the change in mass.

  2. Marked by a teacher

    Osmosis. Aim: To find the molarity of potato tubers cell sap. BIOLOGICAL ...

    4 star(s)

    The potato strips that were in water increased mass because water entered the potatoes by osmosis. The cell sap of the potato cells had less number of free water molecules compared to the solution and there free water molecules from the solution entered the potato cells.

  1. Marked by a teacher

    What is Type 1 diabetes

    3 star(s)

    Eat a healthy diet Eating a healthy, balanced diet with fibre, carbohydrates and not too much fat is important. Possible complications Arteriosclerosis (hardening of the arteries), can also lead to heart attack and stroke. Diabetic kidney disease. Diabetic retinopathy (diabetes related eye-disease).

  2. Peer reviewed

    "An investigation into the Respiration of Carbohydrate Substrates by Yeast."

    5 star(s)

    of two molecules and starch is a polysaccharide, consisting of many molecules. This means they all have different molecular structures and therefore will break down with different levels of ease. In order to keep an open mind however, the following null hypothesis was also noted; Null hypothesis one: 'The type

  1. Design an experiment to investigate the effect of temperature on the movement of a ...

    This is when the molecules of pigment would have to travel through the membrane in the intrinsic proteins. Below is a graph showing how diffusion means that the molecules move to the side with the lower concentration. (Source- http://www.indiana.edu/~phys215/lecture/lecnotes/lecgraphics/diffusion2.gif) Below is a diagram showing facilitated diffusion with channel proteins and carrier proteins.

  2. Investigation on Osmosis using a potato.

    decrease in mass, because the amount of sucrose outside and inside is the same. So this isotonic region is almost exactly the same as the test before. In this graph you can see there is a strong correlation but there are a few points in which they are going away from the line of best fit.

  1. Osmosis is the passage of water from a region of high water concentration through ...

    To make this investigation fair, the conditions will be as follows: Changed variable Constants Solution concentration Surface area of the chip Solution volumes Duration of the experiment Temperature The solution will be the only variable changed during the experiment, this is to ensure that any changes in the results are due to the solution concentration and no other variable.

  2. Investigating water relations in two different plant tissues

    This is because plasmolysis occurred. When a plant cell is placed in a hypertonic solution, it will lose its water and pressure potential causing the cell to become flaccid. The point on the graph where the line of best fit intercepts the x-axis can be used to calculate the water

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