osmosis coursework
... the weight of the vegetables. This means that no water has diffused across the partially permeable membrane through osmosis. This, of course, must mean that the concentration of the vegetables must be the same as the solution, or surroundings, it has been placed in. As I have labelled on my graph by circling and writing the values in, the approximate concentration where no osmosis occurs for each vegetable is: Carrot Parsnip Potato Suede 0.3 (%) 3.0 (%) 0.6 (%) 1.8 (%) This shows that Parsnip has the highest concentration of solute molecules, with Suede having the second highest concentration, followed by Potato and then Carrot. The graph has several anomalies. With carrots, the anomalies were when the concentration was 4% and 5%, the weight increased from the previous values instead of decreasing or stabilising out. This is an anomaly because if the carrot crossed the X-Axis at 0.3%, then it should keep losing weight after that because it is still losing water to osmosis to dilute the more concentrated solution. The same is true with the potato and the suede, which also have a similar type of anomaly, labelled on my graph. The parsnip has a different type of anomaly; the weight at 0% doesn’t follow the pattern that it should because it is lower than the weight at 1%. I can recognize this because the parsnip crosses the X-Axis at 3.0%, which means that at all concentrations before 3.0% the pieces of parsnip should be gaining less and less weight as the concentration of the solution gets closer to the concentration of the parsnip. Therefore at 0% the parsnip should have gained more weight than it did at 1%, which didn’t happen. -Evaluation So, in conclusion, I have found out that parsnip has a higher content of things other than water in it (solutes), at 3%. It is then followed by suede, which has a 1.8% concentration, then potato with 0.6% followed by carrot with 0.3%. However, I would not say that these results are very reliable, because of s...