Apentix/AP Chemistry/Unit 8: Acids and Bases/Question

AP Chemistryeasymcq1 pt

How does a buffer resist pH change when a small amount of strong acid is added?

A.The conjugate base consumes the added H⁺

B.The weak acid neutralizes the added acid

C.The buffer dilutes the acid

D.The buffer boils off the acid

Explanation

Core Concept

Acetate (A⁻) reacts with incoming H⁺ to form HA, so free [H⁺] barely changes. Added base is likewise consumed by HA. Both directions are buffered.

Correct Answer

AThe conjugate base consumes the added H⁺

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