Can you predict water movement based on the relative osmolarities of two solutions? Why or why not?
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Can you predict water movement based on the relative osmolarities of two solutions? Why or why not?
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- Calculate the osmolarity of a 3% NaCl solution. Is this solution hypotonic OR hypertonic?Draw a beaker that is filled with water. Label the water with an osmolarity of 0.61M. In the water, draw a single Elodea cell (note: Elodea is an aquatic plant) with a cellular osmolarity of 0.42M. Name this drawing with the tonicity term that best describes the solution of the water in the beaker compared to the osmolarity of the Elodea cell. Then describe what will happen to the tonicity of the cell over time. Make sure to explain the direction that water will flow, small molecules will diffuse, and explain what will happen to this cell over time. Make sure you use all of the applicable tonicity terms in your description.What are some other biological examples of solutes affecting water potential and therefore movement of water in a living organism? Find examples in both plant and animal.
- Water molecules tend to diffuse in response to their own concentration gradient. How can water be more or less concentrated?You need to prepare 500 ml PBS buffer, a solution commonly used in biological research. The buffer helps to maintain the pH, and the osmolarity, as well as ion concentrations of PBS buffer, match those of the human body. PBS buffer consists of the following components: 137 mM NaCl, 2.7 mM KCl, 10 mM Na2HPO4, 1.8 mM KH2PO4. How would you prepare the buffer?What general conclusion can you make concerning the movement of water? There is always a net movement of water by osmosis toward (a) an isotonic solution, (b) a hypotonic solution, or (c) a hypertonic solution.
- Consider the two solutions separated by an ideal semipermeable membrane (permeable to water but impermeable to solute). Assuming complete dissociation of all the salts you can expect: a.) net water movement from side 1 to side 2 b.) net water movement from side 2 to side 1 c.) no net water movementCalculate the osmolarity of the following solution: Dextrose (MW = 180) 8% %3D Sodium chloride (MW = 58.5) 0.45% Potassium chloride (MW = 74.5) 35mEq Sterile water qs ad 1000mlwhat is the amount of solute in a solution in terms of osmolarity and tonicity?