Potato

... ntration of solution and put each test tube in the right place in the rack 5.I then weighed every potato chip on a top pan balance and recorded the weights in a table. 6. I put 3 potato chips into each test tube and placed the rack in a controlled environment. 3 chips were used to create an average which gave me a better set of results and more accurate graphs. 7. After 24 hours I drained out the solutions in the sink and placed all the chips on the paper towel in the order I had put them in the test tubes as to not confuse myself as to which chip came from which solution. 8. I dried each chip with the paper towel and then placed each one, one by one, on the top pan balance to weigh them and their weights were recorded in a table. Precautions: >Whilst cutting the potato, extreme care and precision had to be taken with the scalpel as it is very sharp and could easily cause a serious wound. >The measurements for the solutions had to be perfect as to not change the out come of the experiment. >I had to ensure that every time I handled the potatoes my hands were clean and dry. This was to stop any kind of contamination and made sure that I did not pass on any extra water onto the potato. RESULTS This graph shown above gives the line of best fit for the percentage change in mass of the potato cylinders. The graph is a curve that slopes downwards and does not go ...