What is the difference between a solution and a suspension?

The distinction between a solution and a suspension is fundamental in understanding different types of mixtures. A solution is classified as a homogeneous mixture, meaning that it has a uniform composition throughout and the solute (the substance being dissolved) is completely dissolved within the solvent (the substance doing the dissolving). As a result, a solution appears clear and transparent, with no visible particles present.

In contrast, a suspension contains solid particles that are dispersed throughout a liquid but are not fully dissolved. This means the solid particles can settle at the bottom of the container if left undisturbed, resulting in an uneven distribution throughout the liquid phase. The presence of these solid particles can make a suspension appear cloudy or opaque.

Understanding this difference is crucial for pharmacy technicians, as it affects the way medications are prepared, stored, and administered. Solutions, for instance, can be more easily measured and dosed accurately, while suspensions may require shaking before use to ensure proper distribution of the active ingredients.