Question

The van't Hoff factor of acetic acid solution is __________ than one and the value of normal colligative property is __________ than the observed colligative property of this solution.

• A. more, less
• B. less, more
• C. less, less
• D. more, more

Answer 1

The correct option is A more, less

The Van't Hoff factor of acetic acid solution is more than one and the value of normal colligative property is less than the observed colligative property of this solution. Acetic acid dissociates into acetate ions and hydrogen ions.

The Van't Hoff factor

$i=\frac{\text{number of solute particles present in solution}}{\text{theoretical number of solute particles for no dissociation}}$

The Van't Hoff factor

$i=\frac{n\text{(observed)}}{\text{n(theoretical)}}$

The Van't Hoff factor

$i=\frac{\text{observed colligative property of electrolyte solution}}{\text{observed colligative property of non electrolyte solution}}$