Sucrose Affects The Rate Of Osmosis

Discussion The change in the amount of sucrose in the dialysis bag affected the amount of mass each bag loss or obtains. All the tubes contained different amount of sucrose concentrations. The higher molarity concentrations increased the movement of water to balance out the inside of the tube and the beaker. The greater amount of concentration gradient, in each tube, increased the rate of osmosis. This rate of osmosis is due to the net movement of water from an area of low concentration to an area of high concentration. Because the tubes had different concentrations, certain tubes gained more mass than others. Solution A had 0.6 molarity which increased the amount of mass by 1.48 grams (15 % change). Solution B had 0 molarity and
increased the mass by .44 grams (5 % change). Solution C had 0.3 molarity and increased the mass by 1.01 grams (10 % change). Solution D had 0.9 molarity, but decreased the mass by 1.99 grams (18 % change).
The trend line placed on the graph consists of an average of 4 different solutions, each with a different molarity. Using an average from this information gives us a good estimate to determine the percent change of a different solution with a molarity that was not tested. If a scientist were to test another solution with a molarity of 0.5, then the trend line would help estimate that the percent change is around 12.5%.
Some errors that could have occurred is if one of the tubes got less volume than another one. This error did not occur within our experiment, but would have decreased the net movement of water, changing osmosis.