Answer: degree of dissociation.
- A the resulting pH value
- B degree of dissociation
- C the average molar mass
- D the total solution volume
Correct answer: B. degree of dissociation
Explanation: The common-ion effect suppresses ionisation, lowering the weak acid’s degree of dissociation.
As the reaction proceeds, reactant concentration falls and product concentration rises until both level off at equilibrium.
Concept context
When forward and reverse reaction rates are equal, equilibrium is reached. Learn about Kc, Kp, Le Chatelier's principle, and acid-base equilibria, including pH, buffer solutions, and solubility product.