Assignment - Osmosis Flashcards
(13 cards)
Analysis, 1
In both my graph and the sources, potato was placed in sucrose solution and the percentage change in mass of the potato was calculated.
Analysis, 2
The source used a wider range of sucrose solutions to me so only 0.0, 0.2, 0.4 and 0.6 mol/l can be compared.
Analysis, 3
In both, when the sucrose solution concentration is at its lowest, the percentage change in mass is at its highest.
Analysis, 4
As concentration increases, the change in percentage mass decreases until, at 0.6mol/l, the change in percentage mass is at its lowest point since the beginning.
Conclusion, 1
In conclusion, the more different the sucrose solutions concentration is from the concentration of sucrose solution in the potato, the more osmosis that occurs into or out of the potato cell.
Conclusion, 2
If the concentration of sucrose solution is higher than that of the potato, it looses water by osmosis and its mass decreases.
Conclusion, 3
If the concentration of sucrose solution is lower than that of the potato, it gains water by osmosis and its mass increases.
Evaluation, 1
I improved the accuracy of my experiment by cutting the potato into pieces using a cork borer so each piece had the same diameter.
Evaluation, 2
I also used a ruler to cut the pieces to the same length.
Evaluation, 3
This ensured that each piece was the same size and shape so could be reliably compared.
Evaluation, 4
One factor which might have affected the precision of my experiment was how much I blotted the potato before reweighing to remove any excess sucrose solution on the outside of the potato.
Evaluation, 5
For the pieces to be blotted equally I should have been more careful to remove all of the liquid from the surface of the potato.
Evaluation, 6
As this could have increased the final measured mass.
