BIOL 100 Lab5 Cell Membranes_Transport Diffusion and Osmosis_RPT.rtf

The solution molarity would be the 06m solution

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The solution molarity would be the 0.6M solution according to my bar graph made in data table 3. I believe this because concluding my lab there was no change in mass which concludes in meaning that the osmosis was already equal.
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Exercise 3: Diffusion Across a Membrane Data Table 4. Dialysis Membrane and Starch Substance Initial Observations Final Observations Solution in Dialysis Tubing Clear, transparent Black, solid Solution in Cup #1 Light orange, transparent yellow Take a photo of the solution in the cup and in the tubing at the end of one hour. Data Table 5. Dialysis Membrane and Sugar Test Tube Substance Initial Observations Final Observations 1 Solution Outside of Dialysis Tubing (Cup 1) Sky blue Olive greenish 2 Solution in Dialysis Tubing (Cup 2) Sky blue Neon orange 3 Distilled Water Sky blue Sky blue Take a photo of the three test tubes when you do the final observation. Questions: A) Define diffusion. The movement f molecules that are passing from a higher to a lower concentration. B) IKI indicator tests for the presence of which substance? Benedict’s reagent tests for the presence of which substance? It tests for the presence of starch and benedicts reagent tests for the presence of glucose and other sugars. C) In the first part of this exercise, a glucose/starch solution was placed in dialysis tubing. Then, the tubing was placed in a cup containing IKI indicator. Did starch stay within the tubing or move out of the tubing? Did IKI indicator stay in the solution in the cup or move into the tubing? Support your answer with the observations you recorded in Data Table 4 . The starch stayed within the tubing in the first part of this exercise because the indicator
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from the outside of the tube managed to get on the inside which caused the solution to change colors. D) In the second part of this exercise, the IKI solution in the cup and the contents of the dialysis tubing were heated with Benedict’s reagent. Did sugar stay within the dialysis tubing or move out of the tubing? Support your answer with the observations you recorded in
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  • Spring '16
  • Laura Harkewicz, Ph.D.
  • Osmosis, 0.6m, 0.4m, 0.2M, 0.0M

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