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An investigation to find the effect of different concentrations of sugar solutions on potato tissue.

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Introduction

Science Investigation Name: Christopher Phillips Candidate Number: An investigation to find the effect of different concentrations of sugar solutions on potato tissue. Introduction I will be investigating the effect of different concentrations of sugar solutions on potato tissue. I want to discover if osmosis will change the mass of a potato after the experiment. I will do this by using a range of solutions from distilled water, to a 2M solution. Osmosis is the passage of water molecules from a high concentration of water to a low concentration of water through a differentially permeable membrane. Osmosis is important in plant cells because water enters plants through osmosis. The cell membrane of a plant is a differentially permeable membrane. ...read more.

Middle

Potato cell in water. Potato cell in strong solution. Apparatus needed To do this experiment I will need: * An electronic balance * Test tubes * A knife * A stopwatch * A potato * A range of sugar solutions (0.2M, 0.4M, 0.6M, 0.8M, 1M, 2M and distilled water) Test tube with solution. Plan/Method 1. To carry out this experiment, first put and cut the potato into 7 pieces. 2. Record the mass of each of the pieces (label them) 3. Place each into a test tube 4. Place each of the pieces in to the solutions (distilled water - 2M) 5. Leave the pieces of potato for about 30-40 minutes. 6. Remove the potatoes 7. ...read more.

Conclusion

I predicted that the results would do this. At distilled water, the potato tissue gained weight, where as at 2M the potato tissue lost weight. When the potato tissue is the same as the surrounding solutions osmosis does not occur. Osmosis is the passage of water molecules from a high concentration of water to a low concentration of water through a differentially permeable membrane. The result for 1M was an anomalous one. This may have been because of differences in the time spent in the solutions, or lack of accuracy in the reading of the scales. Evaluation If I were to repeat this experiment, I would leave the potato tissue in the solutions for a longer time and improve the accuracy in reading the scales. I would also leave all the potato tissues in the solutions for the same amount of time. Overall, I feel the experiment went very well and wad reasonably reliable. ...read more.

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