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

Find the concentration of sucrose in a potato cell - Plan

Extracts from this document...


Plan For Osmosis/Plasmolysis Experiment AIM In this experiment, I am trying to find the concentration of sucrose in a potato cell. Also I can observe when a cell is totally plasmolyised. PLAN I plan to complete this experiment within an hour. Firstly, I will cut 15 potato chips, 3 each for 5 different solutions, each weighing 1.2grams, cut with a 4mm corer to approx (full word) 4cm. I will measure weight, as length is less accurate. The weight of the chip may vary as much as 0.02 g each way, which will make it a lot easier to do, but may provide me with less accurate results. I will use 5 different molar solutions of 20 cm3 each, shown to the right. 0M (water), 0.5M, 1M, 1.5M and 2M. I will create 0.5 molar solutions by mixing 10cm3 of water and 10cm3 of 1 molar solution. ...read more.


I will use 5 different solutions, starting at 0 molar and going up in 0.5 molar concentrations. I have chosen this because they are equidistant, allowing for easy graph drawing, and also because from the preliminary experiment, I know that this will give me results that can show me the concentration of sucrose in the cells sap, and also go on to show me the concentration that the cell will plasmolyise at. I will also control the variety of potato- I will only use 1 brand, as different brands and types may have different concentrations of sucrose in their cells. . Also all solutions will be measured in beakers to 20 cm3, as if there was a higher volume in one solution, it would take longer to fully even out. My results will be quite reliable if I control the points above, and any anomalies will be identified. ...read more.


These results cannot tell me much, as they do not follow what you would expect. 15 MINS. 1.6g CHIP O MOLAR 1 MOLAR 2 MOLAR CHIP A 1.6g 1.36g 1.31g CHIP B 1.59g 1.41g 1.33g CHIP C 1.59g 1.40g 1.32g AVERAGE 1.593 1.39 1.32 AVERAGE CHANGE -0.44% -13.13% -17.50% Prediction My prediction above is in a slight 's' curve, which is based on the test A of my preliminary. Test A seemed to be the most logical to choose as it followed the patterns that I would expect it to. As we can see from it, the water solution increases its weight, and it shows that the cells concentration is , as this is where it crosses the x-axis. And also it shows us that the cell is fully plasmoliesed at around . this is because the graph starts to level off and that means that the chip is not losing any more weight, because the cell is fully plasmolyised. BY MICHAEL PEARCE ...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

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

    4 star(s)

    This is because the temperature provides the water molecules with more energy, thereby making them more mobile. This helps them to travel faster across the membrane. At very high temperature the rate of osmosis falls because the proteins in the cell membrane are destroyed.

  2. Investigation on Osmosis using a potato.

    go into minus figures the potato is now in the region where it is losing weight because it is doing the opposite of osmosis which is plasmolysis. Graph to show first test. As explained above the results resemble a strong negative correlation but now it can be seen very easily in the graph.

  1. Investigating Water Potential Of Potatoes.

    The first task I set myself was to find out what concentrations of sucrose solutions were to be used. APPARATUS Potato Scalpel Ruler Measuring Cylinder (250cm�) 1 molar sucrose Solution Test Tubes Chirograph pen 0.5 molar sucrose solution 0.1 molar sucrose solution METHOD 1 Collect potato 2 Cut out 6 pieces from the potato using a scalpel.

  2. effects of concentrations of sugar solutions on potato chip cells

    my measurable variable will be the length and mass of the chips. I predict that as the sucrose concentration increases the size of the chips will decrease and become flaccid, and as the sucrose concentration decreases the size of the chips will increase and become turgid.

  1. Aim: To find out the water potential of potato cells using different concentrations of ...

    Water always moves from a region of higher water potential to a region of lower water potential. It therefore moves down a water potential gradient. Equilibrium is reached when water potential in one region is the same as the other. There will then be no net movement of water molecules.

  2. Finding out the affect of different concentrations of sucrose solution on the mass of ...

    If the concentrations of water molecules inside the potato and in the sucrose solution are the same then the net flow of water molecules will be the same in either direction. This results in no change in mass of potato chips.

  1. In this Sc-1 experiment, we are going to put potato chips into different concentrations ...

    Also, different types of potatoes may also differ from the amount of water that they can absorb, so I will make sure that the chips I am going to use belong to the same potato specie. The same can also be affected by the potatoes' age.

  2. Investigate whether the different concentration of sugar solution will affect the weight and size ...

    This will allow us to see whether osmosis has taken place, and to what extent in the different solution. The volume of the solution that the potato chips are kept in must be equal. All potatoes must be totally covered in the solution, and the amount of solution will be

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