Conclusion
The overall results support the hypothesis. The experiment involved soaking 20mm (±0.5mm x 2) apple cores in 10cm3 (±0.5cm3) of saline solutions in 0%, 1%, 3%, 5% and 7% concentrations for 1800s (±0.3s (human error)) and comparing the initial masses (g±0.01g) with their masses after soaking (g±0.01g).
There was an outlier in the 13% mass change of the apple core after soaking in 7% saline solution, as shown in Graph 2. However, this outlier and the general trend of the data support the hypothesis.
Graph 1 shows a divergent change in masses of apple cores as the concentration of the saline solution is increased: while there is an increase of 0.04g (±0.01g) in the mass of the apple core soaked in 0% solution after soaking for 1800s(±0.3s(human error)), there is no change in the mass of the core soaked in 3% solution, and there is a decrease of 0.08g (±0.01g) in the mass of the apple core soaked in 7% solution. This supports the hypothesis that while the concentration of the saline solution is less than the salt content of the apple, the core gains mass, then the solution’s concentration reaches equilibrium with the apple’s salt content and the apple core does not change mass, and finally beyond that point, as the concentration of …show more content…
Since the ruler had to be positioned accurately at the start of the sample and cut to 20mm, there was an inaccuracy of ±2x0.5mm. Furthermore, the apple cores were cut with a knife with a serrated edge that could be held at an angle. These factors affected the sizes of the apple cores, in turn affecting the volume and surface area and making the results slightly inaccurate. The apple cores should be cut with a sharp knife with a straight edge, or a machine if possible, and measured with equipment reducing inaccuracies such as a
The overall results support the hypothesis. The experiment involved soaking 20mm (±0.5mm x 2) apple cores in 10cm3 (±0.5cm3) of saline solutions in 0%, 1%, 3%, 5% and 7% concentrations for 1800s (±0.3s (human error)) and comparing the initial masses (g±0.01g) with their masses after soaking (g±0.01g).
There was an outlier in the 13% mass change of the apple core after soaking in 7% saline solution, as shown in Graph 2. However, this outlier and the general trend of the data support the hypothesis.
Graph 1 shows a divergent change in masses of apple cores as the concentration of the saline solution is increased: while there is an increase of 0.04g (±0.01g) in the mass of the apple core soaked in 0% solution after soaking for 1800s(±0.3s(human error)), there is no change in the mass of the core soaked in 3% solution, and there is a decrease of 0.08g (±0.01g) in the mass of the apple core soaked in 7% solution. This supports the hypothesis that while the concentration of the saline solution is less than the salt content of the apple, the core gains mass, then the solution’s concentration reaches equilibrium with the apple’s salt content and the apple core does not change mass, and finally beyond that point, as the concentration of …show more content…
Since the ruler had to be positioned accurately at the start of the sample and cut to 20mm, there was an inaccuracy of ±2x0.5mm. Furthermore, the apple cores were cut with a knife with a serrated edge that could be held at an angle. These factors affected the sizes of the apple cores, in turn affecting the volume and surface area and making the results slightly inaccurate. The apple cores should be cut with a sharp knife with a straight edge, or a machine if possible, and measured with equipment reducing inaccuracies such as a