Which of the following best describes how a suspension differs from a solution?

• A. In a suspension, the particles are large enough to settle out over time, whereas in a solution, the solute particles remain evenly distributed and do not settle.
• B. Suspensions are always transparent, while solutions are always opaque.
• C. A suspension forms only when gases are mixed, while a solution forms only with liquids.
• D. In a suspension, the solute is completely dissolved at the molecular level, while in a solution, the solute remains undissolved.

Answer: (A)

Verified step by step guidance

1. Understand the definitions of suspension and solution: A suspension is a heterogeneous mixture where particles are large enough to eventually settle out, while a solution is a homogeneous mixture where solute particles are dissolved at the molecular or ionic level and remain evenly distributed.
2. Identify the key difference: In a suspension, particles are visible and can settle over time due to gravity, whereas in a solution, the solute particles are too small to settle and remain uniformly mixed.
3. Evaluate the given options by comparing them to the definitions: Check if the statements about transparency, phases involved, and dissolution match the characteristics of suspensions and solutions.
4. Recognize that suspensions are not always transparent and solutions are not always opaque, so that option is incorrect.
5. Confirm that the correct description is that suspensions have particles large enough to settle out over time, while solutions have solute particles that remain evenly distributed and do not settle.