Question

In crystallization, the compound dissolved in a solvent is more soluble in what temperature?

(a) Room temperature

(b) Lower temperature

(c) Higher temperature

(d) Very low temperature

I got this question in class test.

Question is from Methods of Purification of Organic Compounds topic in division Organic Chemistry – Basic Principles and Technique of Chemistry – Class 11

Answer 1

The correct option is (c) Higher temperature

To explain I would say: When a compound is dissolved in water, solubility increases with increase in temperature. This is because, when the temperature increases, the kinetic energy also increases which in turn helps the solvent molecules to break apart the solute molecules more efficiently than in other cases. These solute molecules are held together by intermolecular interactions which requires greater energy to be broken off and hence, higher temperature.