Question detail
In a reaction where the initial rate is measured at different concentrations, what does a zero order with respect to a reactant indicate?
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 is dependent on the concentration of that reactant.
- B. The rate is independent of the concentration of that reactant.
- C. The reactant is not involved in the rate-determining step.
- D. The concentration of that reactant has no effect on the reaction.
Answer
The rate is independent of the concentration of that reactant.
Explanation
A zero-order reaction indicates that changes in the concentration of that reactant do not affect the rate of the reaction. This means the rate is constant and independent of that reactant's concentration.
Common mistake
Incorrect Rate Equation Formation
Students often confuse the order of reaction with the coefficients in the balanced equation when writing rate equations.
To write the correct rate equation, identify the order of each reactant based on experimental data, not the coefficients. For example, if the rate law is rate = k[A]^2[B]^1, this indicates that the reaction is second order with respect to A and first order with respect to B. Ensure to use the correct orders derived from initial rate data.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.