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. If the solute is LiF, which solution is most concentrated?
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Verified step by step guidance1
Understand that the U-tubes contain a semipermeable membrane allowing only water to pass, not the solute (LiF). The left arm has the LiF solution, and the right arm has distilled water.
Recognize that osmosis causes water to move from the side with lower solute concentration (distilled water) to the side with higher solute concentration (LiF solution), causing a difference in liquid levels.
Note that the greater the concentration of the LiF solution, the greater the osmotic pressure, and thus the larger the difference in liquid levels between the two arms of the U-tube.
Compare the height differences of the liquid columns in each U-tube: the tube with the largest height difference between the left (solution) and right (water) arms indicates the highest concentration of LiF solution.
Identify the U-tube with the greatest level difference as the one containing the most concentrated LiF solution.
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