Test Solute Diffusion in Selective Permeability Lab Report

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Question Description

The experiment should test the ability of two molecules-glucose and starch- to pass through cell membranes. In lab we conducted an experiment using dialysis tubing as a model of the cell. The following materials for the experiment was dialysis tubing, 10% starch solution, glucose solution, benedict's reagent, lugol's reagent (IKI), two 100 ml beakers, 4 clips, 4 test tubes, test tube holders, and a test tube rack. Please look below for further information.Please let me know any questions you have. I know my handwriting is terrible.

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Formal lab Lab report format Research paper My results The dialysis tube that was filled with starch did not pass through the membrane. The tube was blue/black in color while the water outside of the tube was orange. Starch was too big to get out of dialysis tubing. Lugolʼs reagent (IKI) will turn blue/ black in color is starch is present. When testing for diffusion of glucose we took water from the glucose beaker and added 1 dropper full of Benedicts. After heating the test tubes for 3 minutes glucose remained blue in color. Based on results glucose did not get out of the bag(meaning it did not pass through the membrane). Glucose was too big to get out. Benedicts reagent will develop an orange precipitate if reducing sugars is present. Even though this is the results that I received we were told by our teacher that glucose was supposed to get out of the tubing. The experiment is worth repeating. ...
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