Question

what is a solution? a mixture with only one type of substance evenly distributed in a space a mixture in which the molecules of one substance are evenly distributed within another substance a mixture in which the molecules of one substance are not evenly distributed within another substance any mixture of substances

Explanation:

A solution is a homogeneous mixture. In a homogeneous mixture, the molecules of the solute (the substance being dissolved) are evenly distributed within the solvent (the substance doing the dissolving).

• Option 1: A mixture with only one - type of substance is not a mixture. A mixture has at least two substances.
• Option 2: This is the correct definition of a solution (a homogeneous mixture where the solute molecules are evenly distributed in the solvent).
• Option 3: If the molecules are not evenly distributed, it is a heterogeneous mixture, not a solution.
• Option 4: Any mixture of substances could be heterogeneous (e.g., a mixture of sand and water) which is not a solution.

Answer:

B. A mixture in which the molecules of one substance are evenly distributed within another substance