1. How is osmosis related to diffusion? 2. What are the two things needed for os
ID: 274511 • Letter: 1
Question
1. How is osmosis related to diffusion? 2. What are the two things needed for osmosis to take place? 3. What does the term semi permeable or selectively permeable mean? 4. Define the following terms: a. hypertonic b. Hypotonic c. isotonic 5. If you were to dissolve some sugar in a liter of water and then place some of this solution into a dialysis bag: then place the bag into a beaker of distilled water, what would happen to the size and weight of the bag of sugar water? 6. Explain the mechanism of what happened to the bag using the terms, concerning osmosis, you have learned in class. -7. Draw out the above procedure and then explain what you would have to do to reverse the process. 9. Why do saltwater fish die when placed in freshwater? Explain your answer using what you have learned about osmosisExplanation / Answer
1. Both osmosis and diffusion involve movement of molecules along the concentration gradient i.e from a region of higher concentration to a region of lower concentration. However osmosis involves a semi-permeable membrane while diffusion does not require a semi-permeable membrane.
2. The two things required for osmosis are: a concentration gradient and a semi-permeable membrane which allows movement of molecules.
3. Semi-permeable membrane allows movement of almost all molecules usually solvent molecules. Selectively permeable membrane allows movement of only selective molecules both solvents and solutes by means of active or passive transport. For example, plasma membrane is a selectively permeable membrane.
4.
a. A hypertonic solution is a solution which has a higher solute content than a cell or another solution.
b. A hypotonic solution is a solution which has a lower solute content than a cell or another solution.
c. An isotonic solution is a solution which has the same solute content as cell or another solution.
5. Water will move from the beaker into the dialysis bag due to higher solute i.e sugar content in the dialysis bag. The size and the weight of the bag will increase due to this movement.
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