What Conditions To Keep Chips In Overnight :: essays research papers

Background Information. I think that this practical will be based on osmosis because ,Osmosis is the random movement of water molecules from a high concentration to a low concentration . This will then happen between the chips and the liquid in the McCarthy bottles . This already tells us that the chips will vary in size from the concentration of water . Plan of the Experiment. Method 1 Firstly we shall set up the experiments by getting the apparatus and the materials (potatoes) ready. We shall then get the 18 McCarthy bottles needed . Then put them on the desk ready for the potatoes to be added when ever. We should then get the weighing scales and the core remover, along with a ruler on the side. 2 Secondly we should core the potatoes and then accurately weigh, and measure them. To measure them we should use a scalpel and a ruler the scalpel should then be used to accurately cut the pieces of potato, the potatoes should all be cut with the same corer to ensure a fair test. To make the cutting even more accurate we should use a square so that the potato is accurately cut. We should also then weigh them accurately so that we will be able to find out the difference after. We should record these results. 3 Also, we should then start to add the liquids to the cylinders , We should then add all the potatoes at roughly the same time after they are all full. We shall then record these details and use them so that when we take them out it will be exactly the right time each. For the test to be as accurate as possible my nights will be until lunchtime the next day, so we can find out exactly which one is the best . 4 Finally when we take them out of the cylinders we should then put them straight onto the weighing scales to find out what the results are. We will then record them to find out the results. Preliminary Work I think that the preliminary work I have completed has helped tremendously with the practical experiment. The work on osmosis has helped with understanding and helping to put together this experiment . Factor In this experiment the factor we will vary will be the S.S.S , this will be the molar amount in the liquid . We are going to use ; 0 molar (distilled water) 0.1 Molar 0.2 Molar 0.4 Molar 0.6 Molar 0.8 Molar