Osmosis Rears its ugly Membrane yet again!

March 15, 2013

This time around in For osmosis we covered the bases using potato cores. What to you mean well we were trying to study Water potential. What is watter potential? It is the potential of a water solution to pure water and its tendency to move. We used it for the purpose of osmosis. Using potato cores we measured the amount of water that transfered from inside the potato to outside and vice versa. We made 6 different solutions each has a different molar ratio of sugar. We had a 0 ,0.2, 0.4, 0.6, 0.8, and 1.0.

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After weighing each core we took put them in the solution left them over night and then measured the mass again. in beakers where the core had a greater molar ratio we found increased mass. because the water was crossing into a higher concentration. As expected in higher molar ratio solutions the cores lost mass for the same reason.

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Above is a picture of our graph. It is the % of the change in mass against the molar ratio if each solution. the point at which there is no change in mass is where the live crosses 0 which would be a .27 molar ratio of sugar to water.


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