adammtimmerman1 adammtimmerman1

14-04-2024
Chemistry

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Consider the following information about the diprotic acid, ascorbic acid. (H2As for short, molar mass 176.1)
H2As ⇌ HAs- + H+ pKa1 = 4.10 (Ka1 = 7.9 x 10^-5)
HAs- ⇌ As2- + H+ pKa2 = 11.79 (1.6 x 10^-12)
The titration curve for disodium ascorbate, Na2As, with standard HCl is shown below
What is the pH at point I?

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