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Consider two solutions separated by a semi-permeable membrane. Solution A contains 1.0M NaCl, while Solution B contains 1.0M KCl. The membrane is permeable to water and Na+ only.

If you wished to keep Na+ from diffusing from Solution A to Solution B, which of the following strategies would likely be most effective?

A. Making the membrane permeable to K+.
B. Making the membrane permeable to Cl-.
C. Making the membrane impermeable to water.
D. Adding additional KCl to Solution B.
E. Creating a positive charge on the B side of the membrane.

Answer :

The appropriate approach is e. Adding a positive charge to the membrane's B side.

What is a simple definition of membrane?

In biology, a membrane is the term used to describe the thin layer that outlines it outside a human cell or an internal cell compartment. The plasma membrane serves as the exterior boundary of the organelles, which are areas enclosed by internal membranes.

What does membrane do?

Cell membranes act as boundaries and checkpoints. Because of their semi-permeability, some chemicals can diffuse out across lipid bilayer but not others. Gases such oxygen and carbon dioxide, as well as small hydrophobic compounds, quickly traverse membranes.

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Final answer:

The most effective strategy to keep Na+ from diffusing from solution A to solution B is to make the membrane impermeable to water. Therefore, option c. Making the membrane impermeable to water would be most effective in keeping Na+ from diffusing from solution A to solution B.

Explanation:

The most effective strategy to keep Na+ from diffusing from solution A to solution B is to make the membrane impermeable to water.

When the membrane is impermeable to water, it prevents osmosis, which is the movement of water across the membrane from a region of lower solute concentration to a region of higher solute concentration. By preventing osmosis, it also prevents the movement of Na+ from solution A to solution B, as Na+ ions are transported along with the water molecules.

Therefore, option c. Making the membrane impermeable to water would be most effective in keeping Na+ from diffusing from solution A to solution B.

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