AP®︎ Chemistry: Topic 8.8 Flashcards

Master key terms and definitions for Topic 8.8 of AP Chemistry – Properties of Buffers to help you prep for quizzes and the AP exam.

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Term

Buffer Components

Definition

A weak acid with its conjugate base, or a weak base with its conjugate acid.

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Buffer Components
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A weak acid with its conjugate base, or a weak base with its conjugate acid.

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Why Strong Acid-Base Pairs Do Not Form Buffers
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Their conjugates are negligible bases or acids, so they cannot neutralize added H+ or OH-.

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Comparable Concentrations in a Buffer
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Both conjugate pair members must be present in significant, similar amounts for effective pH resistance.

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Maximum Buffering When [Acid] = [Base]
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A buffer resists pH change most effectively when conjugate acid and base concentrations are equal.

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Buffer Capacity
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The amount of added acid or base a solution can neutralize before pH changes significantly.

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Buffer Reactions
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Added H+ is consumed by the conjugate base, and added OH− by the conjugate acid.

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Buffer
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A solution of a weak acid-base conjugate pair that resists large pH changes.

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