Answer:
-Water molecules move randomly across the barrier with no net addition of water to either side.
Explanation:
Which of the following best describes conditions at equilibrium?
<em>
-No water molecules are moving across the barrier between the two compartments.
</em>
<em>-A net movement of water molecules continues to add water to the right-hand compartment.
</em>
<em>-A net movement of water molecules begins to add water to the left-hand compartment.
</em>
<em>-Water molecules move randomly across the barrier with no net addition of water to either side.
</em>
<em>-None of these choices accurately describe conditions at equilibrium.</em>
An equilibrium can be described as condition in which there is no net movement of substances across two sides. For example, if A and B are in equilibrium for a particular molecule, the rate of movement of the molecule from A to B is the same as the rate of movement of the molecule from B to A.
Hence, the option that best described conditions at equilibrium is the one in which <em>water molecules move randomly across the barrier with no net addition of water to either side.</em>