2. Burt, the new lab assistant, was asked to make a 0.9 % sodium chloride soluti
ID: 3514109 • Letter: 2
Question
2. Burt, the new lab assistant, was asked to make a 0.9 % sodium chloride solution by putting 4.5 grams of NaCl in the bottom of a graduated cylinder and bringing the volume up to 500 mls with distilled water. Instead, he brought the volume of the solution up to 1 liter. MW NaCl-58.5 g/mol a. What is the percentage concentration of the solution he made? (2 pts) b. What is its osmolarity? (2 pts) c. When human RBC's are placed into Burt's incorrect solution, would they swell, shrink, or stay the same size? Explain why based on the concept of tonicity. Assume RBC osmolarity is 300 mOsM. (2 pts)Explanation / Answer
1. He made 0.45 % NaCl solution
2. Osmolarity
3. As the NaCl solution is Hyposomolar than RBC (ie less concentration) therefore RBC will swell up due to movement of water from outside to inside.
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