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

AP Chemistryeasymcq1 pt

Which statement correctly distinguishes a weak acid from a strong acid in water?

A.A weak acid ionizes only partially, leaving most molecules intact at equilibrium

B.A weak acid contains fewer hydrogen atoms per molecule

C.A weak acid cannot push pH below 7

D.A weak acid dissociates completely but more slowly

Explanation

Core Concept

Acid strength measures the extent of ionization, not hydrogen count or speed. A weak acid establishes an equilibrium with small Ka in which most HA stays undissociated. A strong acid instead ionizes essentially completely, leaving almost no intact HA in solution.

Correct Answer

AA weak acid ionizes only partially, leaving most molecules intact at equilibrium

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