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# Investigate the effects of different concentration of sucrose solution on the mass of potato cells

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Introduction

Investigate the effects of different concentration of sucrose solution on the mass of potato cells The aim of my Investigation is to find out how the mass changes in the different solutions I am investing how the mass of a potato different concentration of solution of sucrose. The only thing that I can control is the different concentration of sucrose solution in each beaker. The Independent variable the thing that I will be changing in this investigation. The concentrations of the solution with potato tissues. The different sugar concentrations will be changed to see the result of the potatoes when placed in sucrose solutions My dependent variables are the change of mass in the potato chips. The other variables that I must control are... > Temperature: because the temperature could affect the kinetic speed of the water molecules, so the solutions must be kept at the same temperature. ...read more.

Middle

In a solution of 0.0M were there is a high concentration of water there would be a very low amount of sucrose, so the potato chip would increase in mass. This is also the same for a 0.2 mole solution and a 0.4 mole solution, because there is a higher concentration of sucrose solution and a lower concentration of water, so the water will move from the area of high concentration to the area of low concentration, until both sides are equal. The glucose molecules try to diffuse to the outside but cannot get through the potato cells membrane because the pores are too small. Water molecules diffuse through the pores down a concentration gradient. The water molecules are moving from the solution in the beaker into the potato cells membrane, because osmosis is occurring. Osmosis is the movement from a high concentration to a low concentration. The glucose molecules try to diffuse to the outside but cannot get through the membrane because the pores are too small. ...read more.

Conclusion

* When this is done I would leave it for 24hr. * After the 24 hrs are over I would remove it from the test tubs and filter the excess solution. * Then re-weight the mass of the potato chips. Solution Experiment 1 Experiment Experiment Average 0.0 0.93 0.88 0.90 0.90 0.2 0.83 0.81 0.84 0.82 0.4 0.63 0.82 0.58 0.75 0.6 0.48 0.56 0.45 0.49 0.8 0.44 0.46 0.56 0.48 1.0 0.47 0.48 0.50 0.45 Evaluation I think that the experiment went very well, I did not have any strange results and they produced a good graph. However there were a few areas where there could be improvement. Firstly, when I dried off the excess water on the potato cylinders after the experiment and before I weighed them, I used a paper towel. This might have either taken some water out of the potato or it might of left some excess water on the potato. This part of the experiment is difficult to come up with an accurate and fair method, as other ways would also lead to some slight mistakes. ...read more.

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

Having the results which backs up my hypothesis, proves that this investigation was fully accomplished, and was an achievement. SOLUTION WEIGHT INCREASE OR PERCENTAGE BEFORE (g) AFTER (g) DECREASE (g) (%) DISTILLED 4.84 4.87 0.03 0.55 WATER 0.2 4.84 4.84 0.00 0.07 0.4 4.76 4.61 -0.15 -3.15 0.6 4.87 4.58

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slightly inaccurate, and I can come to a conclusion much quicker is my results are correct. All of the potato sticks will need to be as close to 5cm as possible, and the quality of all of the sticks will need to be similar.

1. ## To investigate the different effects of various concentrations of sucrose solution on potato cells.

Clingfilm: This will be used to cover the tops of the test tubes to prevent evaporation from happening, which could change the concentrations of the sugar solutions that the potato chips are in, and therefore would ruin the experiment. Watch: I will use this to time the length of time that I leave the potato chips in the solutions.

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Although the solutions have been made up for me I believe the ones chosen are the most logical as they move up in uniform steps from 0.1M to 0.6M and would be fairly easy to prepare. I have already done an experiment similar to this that has helped me prepare for this investigation.

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