Which process is used to separate dissolved substances from their solvent by evaporating the solvent and allowing the solute to crystallize?

Which process is used to separate dissolved substances from their solvent by evaporating the solvent and allowing the solute to crystallize?

• A. Distillation
• B. Filtration
• C. Crystallization
• D. Chromatography

Answer: (C)

Crystallization is the process where a dissolved substance is separated from its solvent by removing the solvent (often by evaporation) so the solute comes out of solution as solid crystals. As the solvent leaves, the solution becomes supersaturated and the dissolved molecules rearrange into a regular solid lattice, forming crystals that can be separated from the remaining liquid. This method exploits the fact that the solubility of many substances decreases as the solvent is removed or the solution is cooled, prompting crystal formation. Distillation relies on boiling point differences of liquids, not solid formation from a solution; filtration simply separates solids from liquids without forming crystals, and chromatography separates components based on interactions with different phases.

Crystallization is the process where a dissolved substance is separated from its solvent by removing the solvent (often by evaporation) so the solute comes out of solution as solid crystals. As the solvent leaves, the solution becomes supersaturated and the dissolved molecules rearrange into a regular solid lattice, forming crystals that can be separated from the remaining liquid. This method exploits the fact that the solubility of many substances decreases as the solvent is removed or the solution is cooled, prompting crystal formation. Distillation relies on boiling point differences of liquids, not solid formation from a solution; filtration simply separates solids from liquids without forming crystals, and chromatography separates components based on interactions with different phases.