Biology - Osmosis Potato Practical

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What was the aim of the osmosis potato practical?
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To investigate the effect of different concentrations of sugar / salt solutions on the mass of potato tissue.
Why is a cork borer used?
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To cut potato cylinders of the same size.
Why must the potato cores be the same size?
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To make the test fair and results reliable.
Why is paper towel used in the experiment?
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To remove excess liquid before measuring mass.
What is the control in this experiment?
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Potato core placed in distilled water.
What happens to the potato cells in distilled water?
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They gain mass because water enters the cells by osmosis.
What happens to potato cells in concentrated sucrose solution?
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They lose mass because the water leaves the cells by osmosis.
What equipment is used to measure potato mass?
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A top-pan balance accurate to at least 0.01g.
How do you calculate percentage change in mass?
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Percentage change=final mass - initial mass / initial mass x 100
Why must onion skin be thin?
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So light can pass through it and individual cells can be seen
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