Let us assume that the composition varies from one region to another, with at least two phases that remain separate from each other, with clearly identifiable properties. Is this a heterogeneous or homogeneous mixture? A. Uniform B. Dissolution C. Non-uniform D. Solution
The correct answer and explanation is:
The correct answer is C. Non-uniform.
A mixture that varies in composition from one region to another and has at least two separate phases with clearly identifiable properties is described as a heterogeneous mixture. This type of mixture is non-uniform because the components are not distributed evenly throughout the mixture. Instead, they retain their distinct characteristics and are easily identifiable in different parts of the mixture.
Heterogeneous mixtures can be classified into different types depending on the phases involved. For example, a suspension involves solid particles dispersed in a liquid, and the solid particles may settle out if left undisturbed. A colloid also involves two phases, but the particles are smaller and do not settle out. Examples of heterogeneous mixtures include things like oil and water, sand and water, or a salad with different ingredients that you can easily distinguish.
On the other hand, a homogeneous mixture (or uniform mixture) is one where the components are evenly distributed, and the mixture appears consistent throughout. Examples of homogeneous mixtures include things like salt dissolved in water or air.
The key difference here is that heterogeneous mixtures exhibit variation in their composition, and you can often see or feel the distinct parts, whereas homogeneous mixtures are uniformly blended and have the same properties throughout.
In summary, the mixture described in the question, where the phases remain separate and identifiable, is non-uniform, and thus, it is a heterogeneous mixture.