Problem: 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.Answer Choices:A. ascorbic acidB. citric acidC. phosphoric acidD. telluric acid

FREE Expert Solution

The pH at volume 1/2 of the volume at equivalence point is equal to pKa hence pKa1 is 2.5.

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Problem Details

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.

Answer Choices:

A. ascorbic acid

B. citric acid

C. phosphoric acid

D. telluric acid

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Our tutors have indicated that to solve this problem you will need to apply the Titrations of Diprotic and Polyprotic Acids concept. You can view video lessons to learn Titrations of Diprotic and Polyprotic Acids. Or if you need more Titrations of Diprotic and Polyprotic Acids practice, you can also practice Titrations of Diprotic and Polyprotic Acids practice problems.