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A beaker is shown with a selectively permeable membrane divider. Both sides contain salt molecules and water molecules.After sitting overnight, what will be the result of the movement of molecules on both sides of the beaker?Select one:a.Water molecules will move from left to right equally; salt molecules will stay the same.b.Water molecules and salt molecules will move from left to right.c.Water molecules will move from right to left; salt molecules will stay the same.d.Water molecules and salt molecules will move from right to left.

Question

A beaker is shown with a selectively permeable membrane divider. Both sides contain salt molecules and water molecules.After sitting overnight, what will be the result of the movement of molecules on both sides of the beaker?Select one:a.Water molecules will move from left to right equally; salt molecules will stay the same.b.Water molecules and salt molecules will move from left to right.c.Water molecules will move from right to left; salt molecules will stay the same.d.Water molecules and salt molecules will move from right to left.

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Solution

The answer is a. Water molecules will move from left to right equally; salt molecules will stay the same. This is due to the process of osmosis, where water molecules move through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration. Since the beaker has been sitting overnight, it's likely that equilibrium has been reached, meaning the concentration of water and salt molecules is the same on both sides of the membrane. Therefore, water molecules will continue to move back and forth equally, while the larger salt molecules, which cannot pass through the membrane, will stay the same.

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