Asked by AA

PLEASE HELP!!

40 mL of 0.1 M solution of a weak acid (adjusted to a pH of 7.75) is titrated with 0.2 M HCl to a final pH of 2.1.

Once the pH of the weak acid reaches 2.1, it is then titrated with 20 mL of 0.25 NaOH. What is the final pH of the solution?

pKa values are 2, 6, and 9.5.

Answers

Answered by DrBob222
I don't know what you've done. Is this a triprotic acid? How is it adjusted? with what?
Answered by AA
It's a tripeptide. It doesn't explain how it's adjusted.
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