In a solvent 50% of an acid HA dimerizes and the rest dissociates. The van't Hoff factor of the acid is (Round off to the nearest integer)

Question

In a solvent 50% of an acid HA dimerizes and the rest dissociates. The van't Hoff factor of the acid is  (Round off to the nearest integer)

Canvas Classes · Accepted Answer

Strategy:
 The van't Hoff factor is the ratio of final total moles to initial moles. Set up a mole balance for 1 mole of HA where portions are converted to dimers and ions.

Step 1: Molecule breakdown for 1 mole of HA
- Dimerization (50%): 0.5 mole of HA reacts to form . Since 2 molecules form 1 dimer, moles of dimerized species = .
- Dissociation (Remaining 50%): 0.5 mole of HA dissociates into  and . Moles of ions = .

Step 2: Sum total moles at equilibrium

Step 3: Calculate

In terms of :

More questions from Solutions