Next we are going to investigate whether chloride ions and glucose molecules will pass through a semipermeable membrane.

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Next We Are Going To Investigate Whether Chloride Ions And Glucose Molecules Will Pass Through A Semipermeable Membrane 1 (39.96 KiB) Viewed 30 times

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Next we are going to investigate whether chloride ions and glucose molecules will pass through a semipermeable membrane. Tie a strong knot in one end of your dialysis tubing. Add half a teaspoon of salt, about 10 mL of water, 10 mL of 1% starch solution and about 5 mL of glucose solution to the dialysis tubing bag you have created. 3. Place the dialysis tubing in a cup of water making sure none of the contents can spill into the water. Leave for 10 minutes. 4. 5. Empty the dialysis tubing into 3 cups. Keep the water the dialysis tubing was placed in. 6. To the first cup add a few drops of 0.1 M AgNO, provided and check for a positive chloride test. 7. To the second cup add a few drops of Benedicts and heat again to check for a positive glucose test. 8. Split the water the dialysis tubing was placed in into 3 cups and test one for chloride ions, one for starch and the other for glucose. 1. 2. I
9. You should be able to see if the chloride, starch and glucose were present in the dialysis tube and in the water the tube was placed in. This will tell you if the molecules are small enough to pass through a semipermeable membrane. Results: Chloride test Glucose Test Starch Test Contents of the dialysis bag White precipitate Orange precipitate Solution turns black/blue Your write up should include: . Contents of beaker Write Up You should submit an Adobe Spark presentation as a group. White precipitate Orange precipitate Solution remains colorless. I A statement summarizing the aim of the experiment Introduction . Safety Information . Data/Observations . Discussion: This should include a discussion on possible errors. Your discussion should also contain a conclusion on which analytes passed through the semipermeable membrane and should identify each as solution, suspension or colloid.