Osmosis in Potatoes

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How is Osmosis Affected By the Concentration

PLANNING

Independent Variable

The independent variable in this experiment is the thing that I will be changing in the experiment. This is the range of concentrations that have been obtained by diluting the original 1M solution of Sucrose. This is therefore the only thing that is going to be altered as I am investigating how different percentage of water molecules affects the weight of the the potato thus the rate and direction of osmosis.

Dependant Variable

The dependant variable will be the mass of the potato as this is the variable I will be measuring. From this I can see the change in mass(g) and so work out the amount of water that has moved and the rate of the osmosis in a
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To makes sure that this does happen and that the controlled variables are controlled I will be doing a second test to ensure that the results are reliable.

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| |(Sample of Potato) Change in Length/mm |

CONCENTRATION / M |1 |2 |3 |mean | |0.0 |50 |52 |54 |52 | |0.2 |50
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