Multiple Choice
Which situation is an example of an isotonic solution with respect to a human red blood cell?
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14. Solutions
Osmosis
Multiple Choice
Four U tubes each have distilled water in the right arm, a solution in the left arm, and a semipermeable membrane between the arms. The images below shown are after osmosis has taken place. If the solute is LiF, which solution was most concentrated?
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Verified step by step guidance1
Understand that osmosis is the movement of solvent (water) through a semipermeable membrane from a region of lower solute concentration to a region of higher solute concentration.
Observe the U-tubes: the side with the solution (pink) and the side with distilled water (blue). After osmosis, the water level changes due to water moving to balance solute concentrations.
Identify that the greater the difference in water levels between the two arms, the higher the osmotic pressure, which corresponds to a higher solute concentration in the solution side.
Compare the water levels in each U-tube: the tube with the largest rise in the solution side (pink) and the largest drop in the water side (blue) indicates the most concentrated LiF solution.
Conclude that the U-tube with the greatest difference in liquid levels after osmosis contains the most concentrated LiF solution.
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