A Semipermeable Membrane Sac Filled with Water and Large Molecules

question 59

Multiple Choice

A semipermeable membrane sac filled with water and large molecules of starch is suspended in a beaker of distilled water. What will happen?

• A) The starch will leave and the water will enter until both sides reach equal concentrations.
• B) Water will enter the sac and it will swell.
• C) Because the starch cannot leave, the water cannot enter.
• D) We cannot determine the outcome unless we know the tonicity of the solutions.
• E) The starch will leave the sac and it will shrink.

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