blackmangotree
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#1
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#1
How can using tap water instead of distilled water in an osmosis experiment affect the rate of osmosis?

Any help is much appreciated!!
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hungrysalamander
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#2
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#2
Tap water has impurities such as minerals which can decrease water potential wheras distilled water pure and has a water potential of 0. This will affect the rate of osmosis as there would be a smaller water potential gradient with tap water.
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blackmangotree
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#3
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#3
(Original post by hungrysalamander)
Tap water has impurities such as minerals which can decrease water potential wheras distilled water pure and has a water potential of 0. This will affect the rate of osmosis as there would be a smaller water potential gradient with tap water.
wait how does pure water have a water potential of 0? Surely if its pure water it is highly concentrated with water so should have a high water potential?
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hungrysalamander
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#4
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#4
(Original post by blackmangotree)
wait how does pure water have a water potential of 0? Surely if its pure water it is highly concentrated with water so should have a high water potential?
The highest water potential is 0, anything with solutes has - water potential
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blackmangotree
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#5
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#5
(Original post by hungrysalamander)
The highest water potential is 0, anything with solutes has - water potential
oooh right thank youuuu
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blackmangotree
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#6
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#6
(Original post by hungrysalamander)
The highest water potential is 0, anything with solutes has - water potential
also i am doing an evaluation on a potato tuber osmosis experiment with sucrose solution. Why is it important that all of the potato tuber is covered in the sucrose solution?
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hungrysalamander
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#7
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#7
(Original post by blackmangotree)
also i am doing an evaluation on a potato tuber osmosis experiment with sucrose solution. Why is it important that all of the potato tuber is covered in the sucrose solution?
The part of the potato not covered in sucrose solution will not experience any osmosis.
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