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Find out the Effect of Sugar Concentration on the Movement of Water in Plant Cells.

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Introduction

SCIENCE EXPERIMENT OSMOSIS Title Experiment to find out the Effect of Sugar Concentration on the Movement of Water in Plant Cells. Aim To test for osmosis. We shall be seeing if the level of sugar concentration affects the rate and the amount of water being passed through the cells in a potato chip. Prediction I think that if you increase the level of sugar concentration in the mixture, less water will be passed through the potato chips cells because the cells will be thicker and stronger. This will only allow a little bit of water to pass through. Background Information (See Appendix A) Method 1. Collect 5 plastic dishes (5cm diameter) and label with the level of sugar concentration you will be testing for. You only need 1 dish per level of concentration. 2. Cut sufficient pieces of chips from potatoes. You need enough to place 1 in each dish. It doesn't matter if they are not of equal size. 3. Place a piece of chip next to each dish. 4. Electronically measure the weight of each piece of chip and record this information. Place the chip next to the tub it was taken from, once weighed. ...read more.

Middle

The change in weight of the potato is an outcome and can be different all time. I cannot change it. Results Experiment Number 1: Sugar Concentration Weight Before Osmosis Weight After Osmosis Change In Weight Increase/ Decrease In Weight 0.0 (Water) 9.59g 9.49g -0.1g Decrease *0.4 7.67g 7.84g +0.17g Increase 0.6 5.80g 5.95g +0.15g Increase 0.8 7.02g 7.06g +0.04g Increase 1.0 8.90g 8.96g +0.06g Increase Experiment Number 2: Sugar Concentration Weight Before Osmosis Weight After Osmosis Change In Weight Increase/ Decrease In Weight 0.0 (Water) 2.74g 2.62g -0.12g Decrease *0.4 3.83g 3.97g +0.14g Increase 0.6 9.26g 9.35g +0.9g Increase 0.8 4.67g 4.80g +0.13 Increase 1.0 5.14g 5.22g +0.8g Increase Experiment Number 3: Sugar Concentration Weight Before Osmosis Weight After Osmosis Change In Weight Increase/ Decrease In Weight 0.0 (Water) 3.82g 3.69g -0.13g Decrease *0.4 6.32g 6.40g +0.8g Increase 0.6 3.40g 3.57g +0.17g Increase 0.8 4.66g 4.85g +0.19g Increase 1.0 4.19g 4.41g +0.22g Increase Experiment Number 4: Sugar Concentration Weight Before Osmosis Weight After Osmosis Change In Weight Increase/ Decrease In Weight 0.0 (Water) 7.90g 7.90g 0.0g The Same *0.4 3.34g 3.46g +0.12g Increase 0.6 3.16g 3.35g +0.19g Increase 0.8 1.54g 1.76g +0.22g Increase 1.0 3.73g 3.95g +0.22g Increase The Average Experiment This is the table showing the averages of the previous 4 experiments. ...read more.

Conclusion

Evaluation There is only 1 major anomaly that can be seen from the results. The change in weight when the sugar concentration was 0.6. All others around this concentration were plus 0.1g but this was plus 0.4g. There are many reasons for this high result. It could have been: * Time - I could have removed the potato too late or put it in too soon * Potato - the potato could have been covered in an unknown substance * Sugar - the concentration may have been altered and not what it said it was * Me - I could have accidentally changed the sugar concentration. I had no problems with this experiment. The instructions were easy to follow and carry out. All I had to was collect the equipment ad run the experiment. If I was to repeat this experiment I would make sure that I had an acid level for 0.2 and the main thing would be to make all the potatoes weigh the same. Approximately 5g. this would make it fairer. Future experiment would involve performing the osmosis on an animal cell and even different plant cells to see if that makes a difference. I could try different levels of acid, or make a new variable instead of the sugar concentration. ...read more.

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