Osmosis lab/ concentrations of solutions effect on potatoes mass.

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"Do different concentrations of solutions determine the mass of a potato?" Introduction: The way to get the full results of this lab was through the process of osmosis. Osmosis is the movement of water across a membrane into a more concentrated solution to reach an equilibrium. When regarding cells osmosis has three different terms that are used to describe their concentration. The first of these words is isotonic. Cells in an isotonic solution show that the water has no net movement and the amount of water that goes in is the same that goes out. Isotonic comes from the root iso, which means equal. This makes sense because the definition of isotonic is: same concentration. The second out of three words is hypotonic. Cells in a hypotonic…show more content…
The dependent variable in the experiment was the percent change in mass and the independent variable was the solution. This is a quantitative experiment because it was measuring the percent change in the mass of the potatoes. Results: Data: The chart below shows the % change in mass after being in their concentrated solutions: Next Page (didn't fit) Concentration (M)0m.2m.4m.6m.8m1m Initial Mass(g)3.6g3.8g3.9g3.1g3.0g3.0g Final Mass (g)4.1g3.9g3.4g2.2g2.0g1.9g % Change in Mass14.9%1.8%-12.1%-28.6%-33.3%-36.9% Analysis: The Graphs below show the percent changes in mass for both the class averages and our group's averages: Conclusion: In conclusion when the molarity level was at 0 and at .2 the potatoes had gained mass so therefore they were placed in a hypotonic environments. When the molarity level was .4 and above the potatoes loss mass so therefore they were placed in hypertonic environments. So the different in concentrations does change the mass of the potatoes because they determine the osmosis environments. Discussion: The hypothesis for this experiment was that at 0m and at .2m the potato core was going to swell making the surroundings it was in hypotonic. For .4m it was stated that the potato core would stay the same, making the surroundings it was in isotonic. For that last three solutions, .6m, .8m, and 1m, it was thought that they would shrink, so that would mean that that the environment that they were placed in was hypertonic. Although these