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Lab Report On Osmosis

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Table one shows collated results from all ten groups of the initial, final and change in mass of the egg after soaking it for ten minutes in the distilled water, 1%, 2%, 5% and 10% Sodium Chloride solutions, as well as the mean change and SEM. The rate of osmosis is also shown, along with the mean rate of change and SEM. All of the groups results show that as the salt concentration increases from 0% to 2% the rate of change in mass decreases with the egg gaining mass. From the 5% salt concentration to 10%, the rate of change increases, but the mass of the egg is decreasing. This indicates that somewhere between 2% and 5%, an isotonic environment was reached. This is all shown in the results, as the average rate of osmosis in the egg after being submerged in the distilled water is 0.105 g/min, the average rate of osmosis after being submerged in the 1% solution is 0.055 g/min, the average rate after being submerged in the 2% solution is 0.028% g/min, the average rate after being submerged in the 5% solution is -0.015 g/min and the average rate after being submerged in the 10% solution is -0.058. The standard error of the mean (SEM) for the rate of osmosis shows that the spread of the data is very slim, which indicates that the data is extremely reliable.

Figure 5. Graphed mean of collated rate of change in mass of the egg with error bars expressed as SEM (standard error of the mean)

Figure five shows that as the sodium chloride concentration increases, the rate of change

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