A homogeneous mixture has a uniform composition, with particles not visible individually.

A homogeneous mixture has a uniform composition, with particles not visible individually.

• A. Has visible particles uniformly
• B. Contains only one phase
• C. Is always a solution
• D. Uniform composition, particles not visible individually

Answer: (D)

The main idea is that a homogeneous mixture has the same composition everywhere and its components are so finely mixed that you can’t see the individual particles. This is why the description that emphasizes a uniform composition and particles not visible individually is the best fit. In such mixtures, the substances blend at the microscopic level to form a single, uniform phase, so you can’t pick out separate parts with the naked eye. Some homogeneous mixtures aren’t solutions (like air or brass), so saying “always a solution” isn’t correct. Seeing visible particles would signal a nonuniform, heterogeneous mixture.

The main idea is that a homogeneous mixture has the same composition everywhere and its components are so finely mixed that you can’t see the individual particles. This is why the description that emphasizes a uniform composition and particles not visible individually is the best fit. In such mixtures, the substances blend at the microscopic level to form a single, uniform phase, so you can’t pick out separate parts with the naked eye. Some homogeneous mixtures aren’t solutions (like air or brass), so saying “always a solution” isn’t correct. Seeing visible particles would signal a nonuniform, heterogeneous mixture.