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Does the strength of salt solution have an effect on the mass of potatoes?

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Introduction

Does the strength of salt solution have an effect on the mass of potatoes? Plan For this investigation I will need:- Potato Different strengths of salt solution Beakers Scales Scalpel I will start by cutting a potato into 6 small cylinders. The cylinders will be 5 cm long and once cut they will be weighed and to make it a fair test I will use the same sized instrument to cut the potato into pieces. After the potatoes have been weighed they will each be places in to a 100ml beaker of salt solution will solute concentrations of 0, 0.2, 0.4, 0.7, 0.8, and also 1. I am using a 100ml of solution in each beaker to make this a fair test and the beakers will be checked in case any solution is spilled. ...read more.

Middle

If there is a lot less water in the solution I expect the mass of the potato to drop because the will be plasmolysed, also the cells will be soft and flaccid unlike a lower concentration in which the cells are rough and turgid Conclusion From my results I have found that if the solute concentration of the salt solution is lower, the more water can de taken on, leading to a positive change in mass. If the salt solution has a higher solute concentration then the change in mass will be negative. This is because the potato had lost water in the time. At around the 0.3 solute concentraion the change in mass will be extremely minimal as you can see from the graph. ...read more.

Conclusion

I think that the test was fair and each potato was weighed and measured to size extremely accurately and they were also all around the same mass at the beginning. Also they were all collected and analysed at the same time. The results were accurate and reliable because the trend that they showed on the graph looked reliable and also the results were fair and reliable. If I could make the investigation even more accurate then I would run the test through 2 or 3 more times to get more accurate results. I could also use several other strengths of solute concentration so I have more results. I could also use another piece of fruit or a vegetable and see whether the concentration of the salt solution had an affect on them ...read more.

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