The ionization states of Phosphoric Acid are shown below: At a pH of 7.4 identify the relevant acid and conjugate base species. Using the Henderson-Hasselbach equation calculate the ratio of acid to conjugate base at this pH.

Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
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Chapter16: Applications Of Neutralization Titrations
Section: Chapter Questions
Problem 16.6QAP
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The ionization states of Phosphoric Acid are shown below: At a pH of 7.4 identify the relevant acid and conjugate base species.

Using the Henderson-Hasselbach equation calculate the ratio of acid to conjugate base at this pH.

HO- -P-ÖH
:OH
H,PO
phosphoric acid
H*
H*
pK.; = 2.148
H*
HÖ-P-O
OH
H.PO pK = 7.198
dihydrogen phosphate
Hö-
–
H+
+
-P-
30:
PO
phosphale (tribusic)
HPOT pK.. = 12.35
monohydrogen phosphate
Transcribed Image Text:HO- -P-ÖH :OH H,PO phosphoric acid H* H* pK.; = 2.148 H* HÖ-P-O OH H.PO pK = 7.198 dihydrogen phosphate Hö- – H+ + -P- 30: PO phosphale (tribusic) HPOT pK.. = 12.35 monohydrogen phosphate
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