Potato Tuber Lab Essay Example for Free

Potato Tuber Lab try outIntroductionOsmosis is a form of dispersion in which water diffuses through a selectively permeable membrane from a region of high tightfistedness to a region of lower concentration. This form of diffusion takes place when the molecules in high concentration are too large to move through the membrane. deuce-ace factors that determine cubicle membrane permeability are shape, size, and polarity. For this experiment, it must be kept in school principal that sucrose is non permeable to the cell membrane, for it is too large to pass through. The cell membrane functions to protect, separate, and check what goes in and out of a cell. It also allows cells to control their internal chemical environment and the availability of all-important(prenominal) materials. In a hypertonic solution, thither is a greater concentration of solute inside a cell compared to another solution (water will flow from out of the white potato cells and the sens will decrease). In a hypotonic solution, there is a lower concentration of solute compared to another solution (water will flow into the potato cells and the mass will increase).In this potato genus Tuber lab experiment, the weight of to each one potato genus Tuber after being sliced into thin disks and rinsed was taken and recorded. The potato disks were then individually placed in sucrose solutions for exactly an hour, each cup being swirled every ten minutes. At the end of the hour, each group of potato tuber slices was weighed a second time to determine if there was a neuter in mass due to the sucrose solution. The percent change in weight among the different potato tubings was determined in order to confirm or deny our hypotheses.My null hypothesis was that the potato would not be touched by the sucrose solution, the osmotic concentration would neither increase nor decrease, therefore there would be no change in mass seen. My alternate hypothesis was that the potato would be affected by the sucrose solution (final mass) by having a higher or a lower osmotic concentration than the initial mass, therefore there will be a change in mass seen.ResultsThe initial weight of the sliced potato tubers ranged from 4.4g to 5.4g. The final weight of the sliced and soaked potato tubers ranged from 3.6g to 5.7g. These results attest that the 0.1 solution of sucrose was hypotonic, create the sliced potato pieces to gain mass, as to where the remaining solutions of sucrose (.00, 0.2, 0.3, 0.4, 0.5) were hypertonic, causing the sliced potato pieces to lose mass. This shows that the potato tubers were affected by the sucrose solutions. This conclusion is represented in the graph given below.DiscussionThe purpose of this experiment was to determine the osmotic concentration of sucrose within the potato tuber slices. Upon coming up with the final results of the experiment, the osmotic concentration of sucrose was calculated to be .06M. For this experiment, an isotonic solution will hav e a molarity of .06M, as the best fit bank line hits the x axis at .06M. In comparison, a hypotonic solution will have a concentration ranging from 0 M to .06M, and a hypertonic solution will have a concentration ranging from .06M or higher. This caused me to accept the alternate hypothesis and reject the null hypothesis therefore, the potato was affected by the sucrose solution as we saw a change in mass of the potato tuber slices.