Salt is the solvent and water is the solute. Salt is the solute and water is the solvent. Salt is the solvent and water is the solution. Salt is the solution and water is the solvent.
I gave my students this multiple choice question: People often use a mixture of salt and water to clean contact lenses. Which statement best describes this mixture?

Only one answer is correct among these 4 choices:
- Salt is the solvent and water is the solute.
- Salt is the solute and water is the solvent.
- Salt is the solvent and water is the solution.
- Salt is the solution and water is the solvent.

Could you tell me which one is correct?

Salt is the solute and water is the solvent.