Concept:Crystallization separates salts by using their different solubility levels in a solvent.
Explanation:When two salts with different solubilities are dissolved together, both form a single solution.
The solution is warmed gently to remove some solvent, or it is allowed to cool slowly.
The salt that is less soluble becomes saturated first.
It then forms pure crystals and separates from the solution.
The more soluble salt remains dissolved because it needs a higher concentration to crystallize.
These crystals can be collected by filtration.
The dissolved salt left behind can be recovered later by evaporating the remaining solvent.
This controlled process of separating solids based on solubility differences is called crystallization.
Distillation separates by boiling point, chromatography by movement through a medium, and evaporation only removes solvent, so none can separate two dissolved salts effectively.
Answer:B. crystallization.