What is the difference between a solution and a suspension?

A solution is a homogeneous mixture in which one substance (the solute) is completely dissolved in another (the solvent). This results in a clear appearance, as the solute particles are so small that they cannot be distinguished and remain evenly distributed throughout the solvent. Because the particles are fully dissolved at the molecular or ionic level, the solution does not scatter light, hence it appears clear.

In contrast, a suspension consists of larger particles that are dispersed throughout a liquid but are not dissolved. These particles will often settle at the bottom over time if left undisturbed. Because the particles in a suspension are larger, they can scatter light, making the mixture appear cloudy or opaque.

Therefore, the distinction between the clarity of solutions and suspensions is central to understanding their physical properties and behaviors. This clarity is a key identifier in differentiating between these two types of mixtures.