Question detail
In a reaction mechanism, if the rate-determining step involves two reactants, how will this affect the rate equation?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Rate equations (A-level only)
Question
- A. The rate equation will include both reactants
- B. The rate equation will include only one reactant
- C. The rate equation will not be affected
- D. The rate equation will be zero order
Answer
The rate equation will include both reactants
Explanation
If the rate-determining step involves two reactants, the rate equation will reflect this by including both reactants raised to their respective orders, which are determined experimentally.
Common mistake
Misunderstanding Rate-Determining Step
Students often confuse the rate-determining step with the overall reaction equation, failing to identify which step limits the rate of the reaction.
To clarify, remember that the rate-determining step is the slowest step in the reaction mechanism that controls the overall rate. Identify the step with the highest activation energy or the one that takes the longest time to occur.
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