Which statement best describes the formation of a solution?

• A. A solution forms when the solvent evaporates, leaving the solute behind as a solid.
• B. A solution forms when the solute particles are evenly dispersed among the solvent particles, resulting in a homogeneous mixture.
• C. A solution forms when the solute settles at the bottom of the container, separating from the solvent.
• D. A solution forms only when the solute is insoluble in the solvent, creating a heterogeneous mixture.

Answer: (B)

Verified step by step guidance

1. Understand the definition of a solution: A solution is a homogeneous mixture composed of two or more substances where the solute is uniformly distributed within the solvent.
2. Recognize that in a solution, the solute particles dissolve and disperse evenly among the solvent particles, meaning the mixture looks uniform throughout.
3. Note that if the solute settles at the bottom or separates, it indicates the mixture is not a true solution but rather a suspension or heterogeneous mixture.
4. Understand that evaporation of the solvent leaving the solute behind is a process to recover the solute, not the formation of a solution itself.
5. Recall that solubility is key: a solution forms when the solute is soluble in the solvent, not when it is insoluble, which would lead to a heterogeneous mixture.