Acid-Base Reactions and Buffers

AP Chemistry· difficulty 3/5

Adding a small amount of HCl to a buffer

A
$Raises pH$
B
$No change at all$
C
$Drops pH dramatically$
D
$Slightly lowers pH; H⁺ converts A⁻ to HA$
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Explanation

Buffer absorbs the acid via A⁻ + H⁺ \to HA, with only small pH change.

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