APFIVE Buffer Solution Composition
Which property is essential for an acid-base pair to form an effective buffer, and why does a mixture of a strong acid and its conjugate base fail to act as a buffer?
A
The acid must be strong; weak acid-conjugate base pairs lack the potency to neutralize significant additions of H+ or OH-
B
The acid must be weak; strong acid-conjugate base pairs are fully dissociated and cannot shift equilibrium to counteract pH changes
C
The acid and base must have equal concentrations; unequal concentrations in strong acid-base pairs prevent effective buffering
D
The base must be strong; weak base-conjugate acid pairs cannot effectively neutralize added OH- ions
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