Discussion
The effect of different concentration on the percentage change in mass while osmosis was observed, and each experiment was performed by calculating the initial and final masses of the potato pieces and the small bag of Visking tube.
According to the table 1 and graph 1, the effect of concentration was identified as the concentration of sucrose increase the percentage change in mass of potato also increase because sucrose is hypertonic solution which means that it has a higher amount of particles dissolved in the solution, while a hypotonic solution such as water where there are fewer particles dissolved. When the potato was put in sucrose concentration where the water potential is larger than that of the potato to the sucrose then mass increased. As it can be seen from the graph, the highest percentage change in mass was in the pure water, the percentage was constituted
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Firstly, the width of the potatoes might not be all the same as they were cut imprecisely, so there might be a random error because not following standard width, which should be constituted at 1-2 mm thick. Secondly, not enough experiments with different independent variables. Experiment under the same independent variable was only conducted one times. Thirdly, the electronic mass kept on changing from 2.0-2.6 g. Human errors in observing the osmosis, pH of the potato slices such as touching potatoes and a small number of trials, which may have led to unreliable results. One of the important weaknesses of the experiment was unstable time periods with watch glass such as not removing the potato slices or Visking tube at the same time. Moreover, the results are not valid enough in appropriate level of investigation and observation. The confidence of received results is reliable at some extent. An effort is made to make the experiment as precise as possible. The level