Temperature
2. Surface area of potato
3. Volume of sucrose solution
4. Same time for each potato chip submerged in solution
5. Potato chips all from same potato
The effects on the dependent variables all differ; here is how the main variables in my experiment work out.
Variable Effect on Dependent Variable
Surface area of potato chip The greater the surface area the more water it will be able to absorb
Same chip from the same potato The genetic make-up will be the same and therefore the partly permemble membrane will be similar
Time left in the solution The longer spent in solution the more that is absorbed
Coating on the potato chips If not rinsed off and dried after a certain period of time the chips will form a coat of sugar thus decreasing surface area
Quantitative prediction
I predict that the effect of changing the sucrose concentration will be that as the concentration of the sucrose solution increases, first of all the mass of the chip will increase, and then the change in mass will gradually decrease until mass is lost and this mass loss will gradually increase in amount... displayed 300 characters
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As the concentration of sucrose increases the concentration of water outside the call will eventually become less than inside the cells of the chip and mass will be lost.
Dependent
Variable
Inside the cells Outside the cells
Dilute solution Concentrated solution
Higher water concentration Low water concentration
Key:
= Sucrose particle
= water molecule
= osmosis
= partially permeable membrane
In the higher sucrose concentration solution, the net movement of water (osmosis) is to the outside of the cell, and the chip will lose mass, the cells will become plasmolysed... displayed 300 characters
