If CH₃COOH associates in benzene, what is the usual value of the van’t Hoff factor i?
Answer and explanation
Correct answer: Less than 1
Association means that two or more solute molecules combine to form a larger associated particle, such as a dimer. Consequently, the number of independent particles in solution becomes smaller than the number expected from the original molecules. Since the van’t Hoff factor compares actual particles with ideal particles, association gives i < 1. Acetic acid dimerisation in benzene is a standard example.
Frequently asked questions
What is the correct answer to this question?
Less than 1
Why is this the correct answer?
Association means that two or more solute molecules combine to form a larger associated particle, such as a dimer. Consequently, the number of independent particles in solution becomes smaller than the number expected from the original molecules. Since the van’t Hoff factor compares actual particles with ideal particles, association gives i < 1. Acetic acid dimerisation in benzene is a standard example.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Some Basic Concepts of Chemistry. Topic: Mole concept and molar mass.
