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Osmosis on potato.

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Introduction

Osmosis on potato Planning Aim My main aim in this experiment is to find out if osmosis occurs in a potato, and how it affects the potato in different solutions of sucrose and water. Apparatus * 5 test tube - for all of the 5 solutions * Marker pen - to label up, just in case of a mix up * Stop Clock - to time our experiment * Cutting tile - to cut the potato on * Knife - to cut the potato * 30cm3 Measuring cylinder - to measure the water * Distilled water - * 0.2, 0.4, 0.6, 0.8, of sugar * Potatoes - part of the experiment * Tissue paper - to dry the potatoes after the osmosis takes place * Balance - to weigh the potatoes * Cork cuter - to cut out potato cylinders * Test tube rack - put the test tube in * glass rod- stir the sugar and 30ml of distilled water Planning We have been asked to investigate the effect of osmosis on potato chips. Osmosis is the diffusion of water from a lower concentration of solute to a higher concentration of solute, through a membrane. I have chosen to investigate the effect of different concentrations of sugar on potato chips. This means that I will put potato chips into sugar solutions of different concentrations. ...read more.

Middle

The potato chips will be cut on a white tile with a scalpel so that no one will be cut. We will be using a very sharp knife, which could injure someone if it's not handled properly. And we will also be careful that the solutions don't get into our bodies internally, just in case, because we are not fully aware of the damage it could do to us. But other than that, there weren't any bigger matters to be cautious of Diagram Method 1. Draw up a table of result and get all equipment 2. Using a cork cuter I cut cylinders out of the potato 3. Using a scalpel and ruler cut the cylinders down to the same size (3mm long). I had to be very careful whilst cutting the potato as the scalpel is exceptionally sharp. 4. Taking a test tube rack place 5 test tubes and then labell them 1, 2, 3, 4 and 5 5. Use the glass rod to stir the sugar and 30ml of distilled water which should be in the test tubes, along with the potato chip to make the experiment work better. 6. Weigh every potato chip on a top pan balance and record the weights in a table. 7. All 5 potato tubes will then be placed in individual test tubes, which are filled with different amounts of sugar. ...read more.

Conclusion

This is due to osmosis, where water passes from weak solutions to strong solutions across a semi-permeable membrane, such as a cell membrane. I think that the results of the experiment agree with my prediction. I am also going to use the same balance to weigh my potato chips. This is because the measurements may slightly vary between scales. I had to ensure that every time I handled the potatoes my hands were clean and dry. This was to stop any kind of contamination and made sure that I did not pass on any extra water onto the potato. Evaluation I think that the method used was fairly accurate, as considering the equipment that I had used I had made the best possible outcome for my results obtained. My method was good; it was easy to carry out and causes no hassles or complications with the investigation. Using more types of solutions would have helped us obtain better results, and more accurate results; so that I can make sure the results are totally correct. When looking at my results I can conclude that they are good enough to support a firm conclusion, as my results were as what I had predicted. Improvements for this investigation would be that I should have repeated the experiment more times, making the results more accurate. I think this experiment turned out to be very successful, and I'm very please with my results. I was very pleased with the complete comparison of my results with my initial prediction. ...read more.

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