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I predict that all of the weight would go down and some will go up. I predict that the higher the concentration the heavier the potato will be and the lower the concentration the lighter the potato will be.

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Introduction

Bilology Coursework By Danielle Barber Investigation. To be safe while doing my investigation I will have to follow the lad safty rules. The experiment included using different types of equipment. The equipment that we used was the following: * Knife * Potato * 25 test tubes * 5 test racks * Weighing machine * Poato plunger * Concentrated water * 0% * 1% * 2% * 3% * 4% * Measuring cylinder * 20 minutes Method We got 5 test tube rack and placed five test tubes in each hole of each rack. All together we had 5 test tubes in each different rack. I measured out 10ml of concentrated water. First I did 0.0% which was just pure water than up to a concentration of 4% which had 4% water in it. First of all I placed this 10ml of pure water in to five of the test tubes and then done the same in five different test tubes each time with a concentration up to 4%. I then weighed out pieces of potato. I weighed five for each different test tube of different concentation. So all together I cut up 25 pieces of potato. The potato it's self had to be a certain weight that we thought was surficant for our experiment we thought that it would be best to do 1.00g's. ...read more.

Middle

We are going to show the weight of the potato chips before Prediction I predict that all of the weight would go down and some will go up. I predict that the higher the concentration the heavier the potato will be and the lower the concentration the lighter the potato will be. Final Results My results that I came up with were: 0.0% Before weight 1 2 3 4 5 0.99 0.99 0.97 0.97 0.98 After weight 1.02 1.02 1.00 1.01 1.02 Difference +0.03 +0.03 +0.03 +0.05 +0.05 Average Weight +0.04 1% Before weight 1 2 3 4 5 0.99 1.01 0.99 1.00 1.00 After weight 0.98 1.01 0.96 0.98 0.98 Difference -0.01 0.0 -0.03 -0.02 -0.02 Average Weight -0.16 2% Before weight 1 2 3 4 5 1.00 1.01 0.97 1.00 0.98 After weight 0.92 0.93 0.92 0.94 0.95 Difference -0.08 -0.08 -0.05 -0.06 -0.03 Average Weight -0.06 3% Before weight 1 2 3 4 5 0.99 0.98 0.98 0.99 1.00 After weight 0.95 0.93 0.92 0.89 0.90 Difference -0.04 -0.05 -0.06 -0.10 -0.10 Average Weight -0.07 4% Before weight 1 2 3 4 5 0.98 1.01 1.00 0.98 0.99 After weight 0.84 0.85 0.87 0.78 0.81 Difference -0.14 -0.16 -0.13 -0.20 -0.18 Average Weight -0.16 Analysis From my graph I can see that when the concentration increases the average weight decreses. ...read more.

Conclusion

On my method I would definatly say measure the volume carefully and dry off the potato as much as possiable to get the excess water off of it. In my graph I found an anomolie. This is where I have an off figure or point. Like this one: This is an amonlie. As you can see it doesn't codordinate with the other results. The causes for this was that it could have been the last one to be taken out of the test tube and been left in the concentration longer than the others. Or that I dried that potato chip more than the other one. I didn't come over any amonalies in my experiment. The further improvements that I could make to my experiment were probally my to plan out my investigation better and to make sure that I know what I am doing before diving in and not knowing what I am doing. Which them leads to no piolt test but using everyone elses results put together. I used potato because it was the best semi-permiable that I could find. I thought about using carrots but them I thoguht that potatos were softer and may have more holes in it, which would lead to a better result. Insttead of using salt I could have used many other substances. Like different types of sugar; caster suger, granet sugar, brown sugar. ...read more.

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