Biochemistry - Water, pH and Macromolecules - Discussion

Discussion :: Water, pH and Macromolecules - Section 1 (Q.No.2)


Polyprotic acids such as H3PO4, can act as acid-base buffers

[A]. only in combination with polyprotic bases
[B]. if their concentration is kept low
[C]. at pH values around neutrality
[D]. at pH values around any of their pKa's

Answer: Option D


No answer description available for this question.

Sundar said: (Apr 1, 2012)  
Can anyone explain this in detail?

Balul9 said: (Jul 3, 2012)  
A polyprotic acid contains more than one acidic hydrogen.

If H3Po4 dissolved in solution following equilibria observed.

H3PO4=====>HPO4-2 (hydrogen phosphate anion) +PO4-3 (phosphate anion) ;.

Daniel Owen Gibson said: (Mar 3, 2013)  
The evidence is proven in organic applications in biochemistry.

Arnold said: (Dec 18, 2015)  
With the pH at its pKa there's more ease and chance in losing a hydrogen atom enabling it to act as a buffer.

Nothile said: (Mar 3, 2016)  
You can determine ph if you know your pka value.

Neetu said: (Jun 4, 2018)  
What is the value of Pk?

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