Which of the following does NOT affect the rate at which a solid solute dissolves in a solvent?

• A. The temperature of the solvent
• B. The surface area of the solute
• C. The amount of light in the room
• D. Stirring or agitation of the solution

Answer: (C)

Verified step by step guidance

1. Understand that the rate of dissolution depends on factors that influence how quickly solute particles interact with the solvent.
2. Recognize that temperature affects the kinetic energy of molecules, generally increasing the rate of dissolution as temperature rises.
3. Know that increasing the surface area of the solute (e.g., by crushing it) exposes more particles to the solvent, speeding up dissolution.
4. Realize that stirring or agitation helps distribute solute particles throughout the solvent, enhancing the rate at which the solute dissolves.
5. Identify that the amount of light in the room does not influence molecular interactions or energy, so it does NOT affect the rate of dissolution.