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Essay / Systematic and random errors in an experiment with...
Referring to the results table, there is a percentage increase in mass change as the concentration of the glucose solution increases. According to Table 1, there was an increase in the mass of the potato tube at 0% concentration but a decrease in the mass of the potato as the concentration of the glucose solution increased (2% at 10%). This process can be explained by osmosis, as mentioned in the introduction. The increase in mass is only accompanied by an increase in turgor; potatoes immersed only in distilled water or low concentrations of glucose were those that gained mass after 20 minutes of immersion. This is because the potato is placed in a hypotonic (0%) solution. So there was more water outside the potato cell than inside. Water molecules would therefore diffuse into the area of lowest water concentration. In this case it was the potato cores, this was done in order to achieve balance. On the other hand, the decrease in mass when the potato was immersed in high concentrations of glucose solution can be explained by its immersion in a hypertonic solution (increased glucose and less water). Because the glucose solution is less concentrated in water molecules than that in the potato core, the decrease in mass and loss of turgor results from the movement of water leaving the potato. The results presented in the graph above were adequate because they confirmed the hypothesis, conversely. From the table it is clear that the data appears inconsistent with respect to the percentage mass change for each potato core. The table did not follow a significant trend because some errors seem to have occurred, however, we can still conclude that the mass of the potato was decreasing overall.ErrorsT...... middle of paper... ...the people who have this experience. Additionally, only one variable was changed (glucose concentrations) while the other variables were controlled. Weaknesses The biggest weakness was the fact that this experiment was not conducted multiple times to highlight systematic errors and again, eliminating random errors that could be avoided. Only a small range of sample sizes were taken and therefore different concentrations outside of the 0% - 10% glucose solution should be tested to have a better understanding of the trend. Potato drying varies and this can have a major effect on the posterior mass of the potato cores. Conclusion In conclusion, the hypothesis “as the glucose concentration increases, the percentage change in mass of the potato tube will increase” is supported. This was represented by the data processed in the results section of the table and graphs..