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To find out what happens when potato chips are put in different strength sugar solutions.

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Introduction

Osmosis Experiment Plan Aim:- To find out what happens when potato chips are put in different strength sugar solutions. Prediction:- I think that the chips we place in the stronger solution will shorten in length. In the distilled water I think that the length will increase. The amount that the chips shorten will be determined by the strength of the solution, the weaker the solution the less they will shrink. Hypothesis:- Osmosis is the movement of water across a partially permeable membrane from a region of high water concentration to a region of lower water concentration. This happens in our experiment because; the outer layer of the potato chips is a partially permeable membrane. These have tiny holes in them, which only water molecules can get through. Inside the potato chips there are sugar molecules and a few water molecules. If we place the potato chip in a water solution because the water molecules in the chip and in the water are bouncing around they are going to find there way through the holes. But because there are more water molecules on the out side in the solution there are going to be more molecules going through into the chip tan out of it, because of this the chip will increase in size. ...read more.

Middle

Also we should be careful when using the scalpel because it will be very sharp. The results table we will Use:- Concentration Try 1 Before Try1 After Try 2 Before Try 2 After Average Distilled Water 0.2m 0.4m 0.6m 1.0m Obtaining Evidence Aim :-To find out what happens when potato chips are put in different strength sugar solutions. Prediction and Hypothesis :-Same as in the plan Method :- As Planned Length Of Potato Stick Concentration (m) Try 1 Length Before (mm) Try 1 Length After (mm) Try 2 Length Before (mm) Try 2 Length After (mm) Average Length After (mm) Change in the length of chip (mm) Distilled Water 35 37 35 36 37 +2 0.2 35 36 35 34 36 0 0.4 35 35 35 33 34 -1 0.6 35 33 35 33 33 -2 1.0 35 32 35 31 31 -3 Equation to work out the average = Try 1 After x Try 2 After / 2 = Average After Analysis Scientific Explanation :- Osmosis is the movement of water across a partially permeable membrane from a region of high water concentration to a region of lower water concentration. ...read more.

Conclusion

If you look back at my graph you will see that there are two, the 0.4m and the 1.0m, these could have been caused by, us not measuring them as accurately as we did with all the other ones, these two could have had less solution than the other ones or they could have been a different size to the other chips. I think that in this experiment we should have had a continuous concentration level, by this I mean that it shouldn't of gone: Distilled water, 0.2m, 0.4m, 0.6m, 1.0m. There should have been a 0.8m in there to give us more accurate readings. We can predict from our graph what it should be but that is exactly an accurate way of doing it. To follow up this experiment with another experiment I would do the same thing again but this time I would use more concentrations, they would be distilled water, 0.1m, 0.2m, 0.3m, 0.4m, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0m. This would give us a more accurate reading. Also to get a more accurate reading I would do each one 5 times to get a much better average over all 5. I would then plot these into the same table as I have done is this experiment and then draw to different types of graphs, to get a better look at my results. ...read more.

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