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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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