Which of the following statements about the solubility of a salt is correct?
- A salt whose solubility increases with temperature would not crystallize easily on cooling
- A salt whose solubility is independent of temperature would normally crystallize out on cooling
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Crystallization would be efficient in separating out a salt whose solubility increases considerably with temperature
- Solubility of a solid does not affect its crystallization
The correct answer is: C
Explanation
Crystallization is based on the principles of solubility: compounds (solutes) tend to be more soluble in hot liquids (solvents) than they are in cold liquids. If a saturated hot solution is allowed to cool, the solute is no longer soluble in the solvent and forms crystals of pure compound.