The pH at volume 1/2 of the volume at equivalence point is equal to pKa hence pKa1 is 2.5.
This is the pH curve for titration of a triprotic acid with NaOH.
Only the first two equivalence points can be observed. What is the most likely identity of the acid?
Refer to the pKa values provided below.
A. ascorbic acid
B. citric acid
C. phosphoric acid
D. telluric acid
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