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The Potato Chip Investigation.

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The Potato Chip Investigation Hypothesis: I predict that the potato chip will decrease in size in the high concentrated solution because the high concentrated solution is stronger and the water particles will diffuse through the potato chip to the salt solution. I don't think there will be a big difference in the weight because the potato chip slices are so small. I predict that the potato chip will increase in weight in the low concentration because there is higher concentration in the potato. Variables: The independent variable is going to be the salt solution as we are going to be changing it for each test tube. The dependant variable will be the changing weight of the potato chip. The controlled variable is the amount of water we use, the same amount of water will be used in each test tube. ...read more.


Repeat the experiment 3 times. 10) Average the results. Concentration range: Ml of salt 1.0 0,75 0.5 0.25 0 Percentage of salt 100 75 50 25 0 Results table: Potato chip A B C D E 1st Weight before 0.4 0.4 0.6 0.7 0.7 1st Weight after 0.5 0.6 0.7 0.7 0.6 2nd Weight before 0.6 0.9 0,9 0.6 0.6 2nd Weight after 0.6 0.9 0.9 0.6 0.5 3rd Weight before 0.6 0.8 0.8 0.7 0.6 3rd Weight after 0.7 0.8 0.9 0.7 0.5 Average Weight before 0.5 0.7 0.8 0.6 0.6 Average Weight after 0.6 0.8 0.8 0.6 0.6 Average Difference 0.1 0.1 0 0 -0.1 Analysing: I have used both a table and a graph to illustrate my results. The best graph to show my results for this experiment was a line graph. ...read more.


However, the temperature may have affected the experiment. During the experiment the temperature of the water was changing, this became awkward. I tried to solve this problem by adding either warm or cold water to change its temperature but this also could affect the experiment because there will be more water in the test tube. Next time I could solve this problem by keeping the solution in one place and try to do the experiment all at once so it is more likely to stay the same temperature. To make my results even more reliable I could have compared my results with someone else's. I could have done a second method involving length and size of the potato chip but I didn't have time. That also can be something that I can do next time. There wasn't any odd results, the ones that didn't fit in the line of best fit weren't far from it so that shows that my results are pretty reliable. ...read more.

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