Which of the following best describes Kool-Aid when it is fully dissolved in water?

• A. Homogeneous mixture
• B. Element
• C. Heterogeneous mixture
• D. Pure substance

Answer: (A)

Verified step by step guidance

1. Understand the definitions of the terms given: An element is a pure substance consisting of only one type of atom; a pure substance can be either an element or a compound with a fixed composition; a homogeneous mixture has a uniform composition throughout; a heterogeneous mixture has visibly different parts or phases.
2. Recognize that Kool-Aid is a mixture of various substances (like sugar, flavoring, and color) dissolved in water, meaning it contains multiple components physically combined, not chemically bonded as a single compound.
3. When Kool-Aid is fully dissolved in water, the components are evenly distributed at the molecular level, resulting in a uniform appearance and composition throughout the solution.
4. Since the composition is uniform and consistent throughout, Kool-Aid in this state fits the definition of a homogeneous mixture rather than a heterogeneous mixture or a pure substance.
5. Therefore, the best description of Kool-Aid fully dissolved in water is a homogeneous mixture.