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Which of the following conditions will m...

Which of the following conditions will make the buffer most efficient?

A

`pH=pK_(a)`

B

`pH=pH_(a)+-1`

C

`pH=pK_(a)+1`

D

`pH=pH_(a)-1`

Text Solution

Verified by Experts

The correct Answer is:
A
Since a buffer solution must maintaina relatively constant pH when either acid or base is added, it is usually desirable for the buffer to have roughly comparable the best case, when `[HA] = [A^(-)],1og[A^(-)]//[HA]=0`, and `pH=pK_(a)`.
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