Imagine a balloon is made from a membrane that's permeable to water but not sucrose molecules. If the balloon is filled with a 50% sucrose solution and then placed in a beaker of water, how will the concentration of sucrose change inside the balloon (if at all)?
A) It won't change.
B) It will become less concentrated.
C) It will become more concentrated.
D) The concentration will increase and then decrease.

Question

Quizplus · Accepted Answer

Since the membrane is permeable to water but not sucrose molecules, water will enter the balloon from the beaker, causing the volume inside the balloon to increase. However, the sucrose molecules cannot pass through the membrane, so the amount of sucrose molecules will stay the same, resulting in a decrease in concentration. Therefore, the concentration of sucrose inside the balloon will become less concentrated.

Imagine a Balloon Is Made from a Membrane That's Permeable