Which term describes a mixture that has a uniform composition throughout?

A mixture that has a uniform composition throughout is referred to as a solution. In a solution, the solute is completely dissolved in the solvent, creating a homogeneous mixture where the composition remains consistent in any given sample. This uniformity is a key characteristic of solutions, making them distinct from other types of mixtures.

For example, when sugar is dissolved in water, the sugar molecules are evenly distributed among the water molecules, resulting in a solution that looks and behaves uniformly throughout. This consistent distribution allows for even properties, such as taste and concentration, within the entire mixture.

In contrast, other types of mixtures like colloids, suspensions, and emulsions do not have this level of uniformity. Colloids consist of fine particles that remain suspended and dispersed, giving a cloudy appearance, while suspensions contain larger particles that may settle out over time. Emulsions are mixtures of two immiscible liquids where one is dispersed in the other, which also does not result in a uniform composition throughout. Thus, the distinguishing feature of a solution is its homogeneity, making it the correct term for this type of mixture.