The cylinders of potato are left in each beaker for approximately 30 minutes. After 30 minutes, the cylinders are removed and blotted with a paper towel, in order to remove excess water. Then, the tissue is weighed again.
Results
Analysis
By observing the table of results and the bar chart above, we can analyse that, as the concentration of the sucrose molarity increases, the weight of the potato tissue decreases. Therefore, this proves my hypothesis to be correct. There is, however, a pattern in my graph, showing that the average weight after Osmosis and the concentration of sucrose are inversely proportional. As the concentration of sucrose rises, the average weight after Osmosis decreases. This graph shows that my first predictions were correct. It shows that the potato cells increase in mass in solutions with a high water concentration and decrease in mass in solutions with a lower water concentration.
As a result, from these experiments, I have found out that my predictions were correct. In lower concentrations of sucrose, Osmosis takes place and the potato chips become turgid. In higher concentrations of sucrose, Osmosis takes place but the potato chips become plasmolysed.
Evaluation
In my opinion the experiment was very successful. I obtained a large quantity of quite accurate results. I was able, from these results, to draw up a somewhat informative graph. I think I took enough results for the amounts of concentrations I was using. I also think that I gave the experiment enough time for Osmosis to occur. Maybe if I were to repeat the experiments again I would probably try using a wider range of concentrations as to find a wider range of more varied results.
The most difficult part of this experiment, in my opinion, was the accurate cutting of the potatoes. It was very difficult to accurately cut the potatoes to the same length and to get them all to the same weight.
In my opinion, there were not many of my results, which were out of the ordinary. Slight differences may have been the result of human error. This could mean that some would have had more excess water than others, resulting in an increased mass. However, I think that my experiment was successful and am quite pleased with my results.
