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What happens when two solutions separated by a selectively permeable membrane reach osmotic equilibrium? what happens when two solutions separated by a selectively permeable membrane reach osmotic equilibrium? water molecules move between the two solutions, but there is no net movement of water across the membrane. water molecules continue to move from the hypotonic solution to the hypertonic solution. water molecules no longer move between the solutions?

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jamiexx
The answer should be water molecules still move between two solution, but no net movement.
Osmotic equilibrium means where two solution has reached the same amount of water potential because of the osmosis before, they have the same solute concentration now.
Always remember that water molecules still move in all solutions, but just that since there's no more concentration difference, the water molecules that move from right to left and left to right is equal. Therefore there's no net movement.
Histrionicus

When two solutions separated by a selectively permeable membrane reach osmotic equilibrium - Water molecules move between the two solutions, but there is no net movement of water across the membrane.

When two solutions are separated from one another by the semipermeable membrane then water tends to move from high concentration area to lower concentration area. This process is called osmosis.

  • Water will tend to move across the membrane to the low concentration of water until equilibrium is reached.
  • In this case, both solutions have the same concentration or react to osmotic equilibrium, which means they will have the same concentrations so there will be no net movement of water across the membrane.

Thus, the correct choice would be - Water molecules move between the two solutions, but there is no net movement of water across the membrane.

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