Which of the following best describes a uniform solution?

• A. A solution in which the composition is the same throughout
• B. A solution that separates into layers over time
• C. A solution that contains visible particles suspended in the solvent
• D. A solution formed only by mixing two solids

Answer: (A)

Verified step by step guidance

1. Understand the definition of a solution in chemistry: a homogeneous mixture composed of two or more substances where the solute is uniformly distributed within the solvent.
2. Recognize that a uniform solution means the composition is consistent throughout the entire mixture, with no variation in concentration or appearance in any part of the solution.
3. Contrast this with other options: a solution that separates into layers is heterogeneous, a solution with visible suspended particles is a colloid or suspension, and mixing two solids does not necessarily guarantee a uniform solution.
4. Recall that the key characteristic of a uniform solution is homogeneity, meaning every sample taken from the solution has the same composition and properties.
5. Therefore, the best description of a uniform solution is one in which the composition is the same throughout.