Answer
pH = 2.80
Explanation
Dissociation of diprotic acid is as follows
H2A <------> HA- + H+ pKa1 = 2.80
HA- <-------> A2- + H+ pKa2 = 6.50
at half neutralization
H2A = HA-
Henderson - Hasselbalch equation is
pH = pKa + log([HA-]/[H2A])
pH = 2.80 + log1
pH = 2.80
Therefore
at quarter neutralization point , pH = 2.80
Part E A diprotic acid has a pKa1 -2.80 and pka2 6.50. What is the pH of a 0.10 M solution of thi...
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home / study / science / chemistry / chemistry questions and answers / a diprotic acid has a pka1 = 2.90 and pka2 = 6.50. what is the ph of a 0.10 m solution of ... Question: A diprotic acid has a pKa1 = 2.90 and pka2 = 6.50. What is the pH of a 0.10 M solution of this a... A diprotic acid has a pKa1 = 2.90 and pka2 = 6.50. What is the pH of a 0.10...
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