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Quick citric acid question

  • Thread starter vande060
  • Start date
  • #1
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Homework Statement



just a curosity of mine. citric acid is triprotic, with a pKa3 of 5.41, so does this mean that i will be inf ull conjugate base form(3-) at solution pH >5.41



Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
Borek
Mentor
28,358
2,746
No, at pH 5.41, [HA2-] = [A3-]. It always works this way.

Check out this page: titrations.info/acid-base-titration-indicators

While discussion there is about pH indicators, equation 2 describes every weak acid you can think of.
 

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