Analysis The purpose of this experiment was to see if different substances, like starch, iodine, water, and glucose, can diffuse through a dialysis tube. Starch and water were in the tubes, and iodine and glucose were in the beaker. Setup 1- The hypothesis that starch would not diffuse was correct. The orange color of the iodine beaker stayed the same, which supports the hypothesis that starch did not diffuse. If it had diffused, the color would have become black, like the tube. The hypothesis that iodine would diffuse was correct. The color of the tubing turned black after the iodine had diffused, which is an indication that the iodine hypothesis was correct. The data shows that the mass of the starch-filled tubing increased from14.8 to 15.1 grams, which supports the hypothesis. Setup 2- The hypothesis for water was correct. The glucose concertation in the beaker was at 60 mMol before the test. After placing the water-filled tube into the beaker the concertation lowered to 50 mMol. This is because the water diffused out of the tubing and diluted the glucose solution. The hypothesis for glucose was incorrect. The mass of the water-filled tube increased from 16.3 grams to 16.8 grams after being placed in the beaker with glucose. There was no glucose concentration before …show more content…
In order to have accurate results, the tubes had to either both be completely submerged under the solution or have the same amount of tubing under the solution. If it was not in the solution completely, the solution inside would not diffuse out. There are no limitations to this experiment because any solution can be used inside the dialysis tube or in the beaker. This experiment could be improved if there was more time to let the solutions diffuse so the investigator can learn how long it takes to reach equilibrium. The next step of this experiment could be to try to get a gas to diffuse into a