Which of the following statements about the solubility of a salt is correct?
CHEMISTRY
WAEC 2020
Which of the following statements about the solubility of a salt is correct?
- A. A salt whose solubility increases with temperature would not crystallize easily on cooling
- B. A salt whose solubility is independent of temperature would normally crystallize out on cooling
- C. Crystallization would be efficient in separating out a salt whose solubility increases considerably with temperature
- D. Solubility of a solid does not affect its crystallization
Correct Answer: C. Crystallization would be efficient in separating out a salt whose solubility increases considerably with temperature
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.
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