AP Chemistry Flashcards: Pre Equilibrium Approximation

Study Pre Equilibrium Approximation in AP Chemistry with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

What is the main condition for applying pre-equilibrium approximation?

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ANSWER

The early step reaches equilibrium quickly. Fast reversible step must equilibrate before slow step proceeds.

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What this deck covers

This deck focuses on Pre Equilibrium Approximation, giving you a quick way to review the definitions, rules, and examples that matter most for AP Chemistry.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Practice questions

1 of 23Practice questions for this set

A reaction is proposed to proceed by the following mechanism. The first step is fast and reversible and is described as establishing a pre-equilibrium prior to the slow step. Step 1 (fast, reversible; pre-equilibrium):

\mathrm{Br_2 + Fe^{2+} \rightleftharpoons FeBr_2^{2+}}

Step 2 (slow):

\mathrm{FeBr_2^{2+} + Fe^{2+} \rightarrow 2Fe^{3+} + 2Br^-}

Under these pre-equilibrium conditions, which qualitative rate law is most consistent with the mechanism?

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