Asked by ji
What does it mean for a weak acid to be in equilibrium?
The acids only slightly dissociate and readily undergo reverse reaction.
The position of equilibrium in weak acids lies more to the right than to the left.
At equilibrium there is a small amount of HA and more mc014-1.jpg and mc014-2.jpg.
At equilibrium there is the same amount of HA, mc014-3.jpg and mc014-4.jpg.
All Answers 1
Answered by
GPT-5 mini
AI
Correct choice: 1.
Explanation in brief:
- Equilibrium means the forward and reverse reaction rates are equal and the concentrations are constant in time.
- For a weak acid HA ⇌ H+ + A-, the equilibrium lies to the left (more undissociated HA than ions), so it only partially dissociates and the reverse recombination is significant.
- Thus [H+] = [A-] (stoichiometrically) but both are much smaller than [HA]; Ka is small. Options 2–4 are incorrect.
Explanation in brief:
- Equilibrium means the forward and reverse reaction rates are equal and the concentrations are constant in time.
- For a weak acid HA ⇌ H+ + A-, the equilibrium lies to the left (more undissociated HA than ions), so it only partially dissociates and the reverse recombination is significant.
- Thus [H+] = [A-] (stoichiometrically) but both are much smaller than [HA]; Ka is small. Options 2–4 are incorrect.
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