Question

Which of the following options are correct regarding the degree of dissociation of a weak electrolyte:

• A. depends on the nature of solute and solvent
• B. increases with increase in dilution
• C. increases with increase in temperature
• D. none of the above

Answer 1

Answer: (A), (B), (C)

The correct options are
A depends on the nature of solute and solvent
B increases with increase in dilution
C increases with increase in temperature

The degree of dissociation of a weak electrolyte:
(A) depends on the nature of solute and solvent. Higher is the dielectric constant of the solvent and lower is the viscosity of solvent, higher is the degree of dissociation as the inter ionic attractions decreases.

(B) increases with increase in dilution

(C) increases with increase in temperature. With increase in temperature, inter-ionic attractions, solvation of ions, viscosity decreases and the kinetic energy of ions increases.