Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Which of the following statement/s is/are correct about weak acids in aqueous solutions?
I. When pH = pK a of a monoprotic acid, 50% of the acid is ionised
II. If pH = pKa 2 of a diprotic acid, the average charge of all the ionised species is 0.5
III. When pH = pKa + 1, 10% of the acid is ionised
IV. When pH = 7, 50% of a monibasic acid is ionized.
Text Solution
Verified by ExpertsThe correct answer is:
D
When pH = pK a of a monoprotic acid, [A – ] eq = [HA] eq .
So, 50 % of acid is ionised.
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