In a homogeneous mixture with components evenly dispersed at the molecular level, what is the term for the mixture?

• A. Solution
• B. Emulsion
• C. Suspension
• D. Combination

Answer: (A)

When a mixture is homogeneous and the components are spread evenly at the molecular level, it’s called a solution. In a solution, the dissolved substance becomes indistinguishable from the solvent, forming one uniform phase with particles that are too small to see and that don’t settle out over time. This is different from emulsions, where immiscible liquids form droplets and the mixture can look cloudy; and suspensions, where larger particles float or sink and the mixture is not uniform. The term “combination” isn’t used to describe this science concept. A common example is salt dissolved in water, which creates a uniform, single-phase liquid.