Question

How does the acid buffer capacity compare to the base buffer capacity for a buffer with...

How does the acid buffer capacity compare to the base buffer capacity for a buffer with 0.450M HCOOH and 0.550M HCOO-?
A) BsubA =BsubB
B) BsubA < BsubB
C) BsubA > BsubB
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Answer #1

The concentration of base is 0.55 M in the buffer and concentration of acid is 0.45 M in the buffer. On addition of strong acid to this buffer, 0.55 M of base will react to stabilize the pH. Whereas on addition of strong base, only 0.45 M of acid will react to stabilize the pH.

Acid buffer capacity will depend upon the concentration of base, while basic buffer capacity will depend upon the concentration of acid.

since [HCOOH] < [HCOO-]

therefore acid buffer capacity will be more than that of basic buffer capacity.

the correct answer is BsubA > BsubB

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