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# Investigate which salt solution will keep the potato chip freshest for longest.

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Introduction

Potato Chip Experiment Aim: Investigate which salt solution will keep the potato chip freshest for longest. Prediction: In my experiment, I am going to be using the salt solutions: 1) Om. 2) O.2m. 3) O.4m. 4) O.6m. 5) O.8m. 6) 1m. We will be experimenting to which salt solution will keep the chip freshest, for longest. In the experiment I predict that the salt solution most likely to keep the potato chip freshest will be the O.2m salt solution. I believe this because the only piece of information we were given was that the red blood cell concentration was O.25m, and from that piece of information, I believe that the O.2m salt solution will keep the potato chip freshest for longest. I think that O.2m will be the best solution because anything less than the red blood cell concentration O.25m for example Om, will let water into the cell and make the potato chip soggy, and anything higher than O.25, for example O.4m, will let water out of the cell, therefore the potato chip will shrivel and go black. Scientific Theory: In the experiment the salt solution will affect the freshness of the potato chip. ...read more.

Middle

To keep all chips equal in size If one chip was larger in size than the rest, the experiment would not be a fair test Salt solutions. Different concentrations as the changing variable To test which concentration will keep the potato chip freshest Potato. To cut chips out of Do the experiment can be performed Measuring cylinder To measure out the amount of solution To keep the amount of solution in each yogurt pot equal. Goggles To protect eyes To prevent unnecessary injury Fairtest: 1) The potato chips must all be in the salt solutions for the same amount of time. 2) Label all the yogurt pots. 3) Potato chips must be all the same size. 4) Pat all chips dry in the same way. 5) Only the difference in the concentration of the salt solution. 6) The experiment will be done at room temperature. 7) We will use the same potato from which to cut out the potato chips. 8) I will make sure that the amount of salt solution is the same in every yogurt pot. Safety: 1) Knife put somewhere safe when not being used. ...read more.

Conclusion

If I were to repeat the experiment I would have possibly found a machine to cut the potato, as it would ensure that all potatoes would be the same weight and dimensions. As well as the potato I could have found a more accurate way to measure out the solutions. This would ensure that I have an accurate amount of fluid in each test tube. I could also weigh each chip on a more accurate scale, e.g. not to 0.00g but to 0.0000g. There were not any out of the ordinary results, but some were not as close to the line as others. This may have been caused by human error. When the potato chips were removed from the yogurt pots and dried I may well have dried some potatoes more thoroughly than others and so some would have more excess water. If the experiment was repeated I could find another way to dry the potatoes that would ensure that all were dried in the same way for the same time. However I think that the experiment was a success and I was very pleased that my prediction matched the end result that O.2m is the best salt solution to store potato chips in. ...read more.

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