1. For each of the tubing pieces, identify whether the solution inside was hypotonic, hypertonic, or isotonic in comparison to the beaker solution it was placed in. The green 3% solution is a hypertonic solution, the yellow 30% and the red 15% solutions are hypotonic solutions. 2. Which tubing increased the most in volume? Why? The yellow 30% solution increased the most. 3. What does this tell you about the relative tonicity between the contents of the tubing and the solution in the beaker? The solution in the tube is mixing with the solution in the beaker making it weaker. 4. What would happen if the tubing with the yellow band was placed in a beaker of distilled water? The yellow tube would try to even out with the solution in the tube and the solution in the beaker. 5. How are excess salts that accumulate in cells transferred to the blood stream so they can be removed from the body? Explain how this process works in terms of tonicity. The salts move through the membrane into the blood stream because the salts are hypertonic. 6. How is this experiment similar to the way a cell membrane works in the body? How is it different? Be specific with your response. The natural tendency for the cell to try to reach an equilibrium is the similarity but cells might not always go to higher solution concentrations. 7. If you wanted water to flow out of a tubing piece filled with a 50% solution, what would the minimum concentration of the beaker solution need to be? Explain your answer using scientific evidence. The minimum would be 50.1%. The tube just has to be lower than the solution it will be submerged in. Picture of the set up:
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- Fall '19
- 50%, 15 cm, 15 %, 30 %, 3.0 cm