Question

The principle behind purification by crystallisation is that the:

• A. amount of solute that can be dissolved by a solvent increases with temperature
• B. amount of solute that can be dissolved in a solvent decreases with increase in temperature
• C. both a and b
• D. none of above

Answer 1

The correct option is A amount of solute that can be dissolved by a solvent increases with temperature

Crystallisation is one of the very important purification techniques, purifying substances by removing unwanted by products. Crystalline compounds are generally purified via this crystallisation process. The principle behind the crystallisation is that the amount of solute that can be dissolved by a solvent increases with temperature.