Investigate how the Concentration of a Sucrose Solution affects the Rate of Osmosis

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Investigate how the Concentration of a Sucrose Solution affects the Rate of Osmosis

Introduction:

Diffusion is the movement of particles from a high concentration to a low concentration until they are spread out evenly. An example of diffusion is when an aerosol is sprayed. The particles spread out from the high concentration at the nozzle into the rest of the room and that is how the smell moves.

Osmosis is the passage of water molecules from a weaker solution to a stronger solution through a partially permeable membrane. Osmosis is a type of diffusion involving water - the water molecules move from a weak solution (with a high concentration of water) into a strong solution (with a low concentration of water).

The cell membrane in a
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The reason I predict that three will increase in mass and two decrease is because in my preliminary experiment this was shown to be the case in these concentrations, however this could change in my real experiment.

The chips that increase in mass have taken on more water which means that at the beginning of the experiment the sucrose solution had a higher concentration of water than the chip and this is likely to apply to the weaker sucrose solutions as they have a low concentration of sugar and therefore a high percentage of water molecules. The strong sucrose solutions have a higher percentage of sugar molecules and therefore a lower percentage of water molecules and if the concentration of water in the potato chip is higher than in the solution then water will leave the potato chip by osmosis and therefore the chip will lose mass. The water molecules move into cells that contain a lower concentration due to the difference in osmotic potential between cells. The water molecules move through a semi-permeable membrane (the cell membrane) which has big enough holes in it to let through the small water molecules, but not the bigger sucrose molecules. At a certain concentration of sucrose solution the concentration of water will be the same in both the chip and the solution which means there will be no transferral of water between the
two
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