Practice Pre-equilibrium Approximation (4.7) - Unit 6: Chemical Kinetics

Practice: Pre-Equilibrium Approximation

Lesson 4.7Unit 6: Chemical Kinetics

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9 questions

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6 sample questions

Question 1.
What is the Pre-Equilibrium Approximation?
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Think about fast steps in reactions.
Question 2.
Why is it useful to express intermediates in terms of reactants?
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Consider how we measure reaction rates.
3Question 3.
What does the Pre-Equilibrium Approximation treat as being in equilibrium?
- The slow step
- The fast initial step
- The overall reaction
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Remember the role of speed in reactions.
4Question 4.
True or False: The Pre-Equilibrium Approximation is only applicable when all steps have comparable rates.
- True
- False
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Consider the relationship of step speeds.
Question 5.
A reaction A + B ⇌ I (fast) → Products (slow) has an equilibrium constant K = 2. However, if the formation of I is slower than anticipated, how might this affect the accuracy of your rate constant calculations?
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Consider if the initial step shapes the outcome.
Question 6.
Construct a conceptual map demonstrating how the Pre-Equilibrium Approximation is utilized in complex kinetics and discuss the importance of each component in the mechanism.
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Link each component back to how it affects rate laws.

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