Question

multiple choice question
imagine you have solute molecules at a very high concentration at a specific location within a solvent. all molecules move around randomly. what will result over a period of time?

no change will occur.
the solute will settle to the bottom of the container.
solute molecules will spread out evenly reaching equilibrium.
solute molecules will pack together even more tightly.

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Explanation:

This question is about the movement of solute molecules in a solvent. The concept of diffusion (random movement of molecules) leads to solute molecules spreading from an area of high concentration to low concentration until equilibrium (even distribution) is reached. "No change" is wrong as molecules move. "Settle to bottom" is for sedimentation (like in suspensions, not solutes in solutions with random motion). "Pack tighter" goes against random movement and diffusion. So the correct option is the one about spreading evenly to equilibrium.

Answer:

C. Solute molecules will spread out evenly reaching equilibrium.