Classify the following substance as: a pure substance, a homogeneous mixture, or a heterogeneous mixture.

dish soap

Question

Classify the following substance as: a pure substance,  a homogeneous mixture, or a heterogeneous mixture.

dish soap

BlackTom AI · Accepted Answer

To classify dish soap, we evaluate whether its composition is uniform throughout or contains visibly different parts.
Option 1: heterogeneous mixture. If a substance is a heterogeneous mixture, its components are not uniformly distributed and you can often see different phases or particles with the unaided eye. Dish soap in a bottle does not show distinct layers or clumps when mixed; its ingredients are spread evenly, so this option is not correct.
Option 2: homogeneous mixture. A homogeneous mixture has a uniform composition and appearance throughout. Dish soap is formulated to be consistent in composition when stirred or shaken, producing a single, uniform solution-like mixture at the macroscopic level. This aligns with the definition of a homogeneous mixture, making this the correct choice.
Option 3: pure substance. A pure substance consists of only one type of particle or molecule (elements or compounds) with a fixed composition. Dish soap contains multiple chemicals (surfactants, solvents, fragrances, dyes, preservatives), so it is not a pure substance.
In summary, dish soap behaves as a uniform blend of several components, i.e., a homogeneous mixture, rather than a heterogeneous mixture or a pure substance.

Classify the following substance as: a pure substance, a homogeneous mixture, or a heterogeneous mixture. dish soap 单项选择题

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