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The effect of sucrose solution concentration On osmosis in potato chips

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Introduction

The effect of sucrose solution concentration On osmosis in potato chips Plan I am going to cut six pieces of potato using a borer. They will all the same weight. I will make them all 0.7g. I will be able to make sure they are all the same weight-using scales. If a piece of potato is too big I will use a scalpel and a tile to trim it so they are all the same weight and then place these into a test tube each. I will hold the test tubes in a test tube rack. Using the measuring cylinder I will measure 10ml of each strength of sugar solution rinsing the measuring cylinder after each measure. This will then be added into separate test tubes with the pieces of potato. E.g. a piece of potato will have 0.0M strength; a piece of potato will have 0.2M strength and a piece of potato will have 0.4M strength etc. I will put a sticky label on each test tube stating what strength of sugar solution it contains. ...read more.

Middle

0.7 0.6 - 0.1 0.4 - 0.3 1.0 0.7 0.5 - 0.2 0.4 - 0.3 I will observe how much the potato increases or decreases in weight after being in the sucrose solution for a certain amount of time. Analysis My results show that as the molar used increases the weight of the object gets further away from staying the same as its starting weight. My graph shows a pattern in the numbers that when the molars 0.4 and 0.6 were used the same result occurred all the other results were different but not that different. They were only different between 0.1g and 0.2g in weight. My graph shows that the weight of a plant cell can be changed using osmosis. As osmosis is the diffusion of fluid through a semi permeable membrane from a solution with a low solute concentration to a solution with a higher solute concentration until there is an equal concentration of fluid on both sides of the membrane. ...read more.

Conclusion

Some things that went wrong with my experiment were that the borer would sometimes break a piece of potato I had just removed from the potato and that sometimes the pieces of potato I picked from the potato were not heavy enough as they all had to be the same weight for my experiment to be a fair test. My results were as accurate as I could make them. I did this by using tweezers to pick them out as to not squeeze some of the weight of them out onto the table. On test 1 when using the molars 0.0 and 0.2 the weight ended up enlarging by 0.1 instead of supposedly decreasing. These are the only anomalous results I can find in my results. I could improve my experiment to improve the accuracy by using a more precise set of scales that maybe measured to 2 decimal places or more rather than the 1 decimal place ones that I used. I would expect that I would get very similar results if I did it again. I would expect this, as my results are similar to others. ...read more.

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Here's what a teacher thought of this essay

3 star(s)

This report contains some good sections and has an appropriate structure,
1. The section on osmosis is well written and concise.
2. The apparatus section is well structured.
3. The evaluation section shows promise.
4. The language used is inconsistent and some sections need to be rewritten.
5. The report is missing several sections, such as an introduction and a conclusion. However, some of this information is present in other sections.
*** (3 stars)

Marked by teacher Luke Smithen 08/05/2013

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