Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a rate expression?
💡 Hint: Think about how we express rates in chemical reactions.
Question 2
Easy
Define the rate constant (k).
💡 Hint: Focus on what k signifies in a rate expression.
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Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does the order of a reaction indicate?
- A. The concentration of reactants
- B. The sensitivity of the reaction rate to changes in reactant concentration
- C. The volume of products formed
💡 Hint: Consider how changing reactant levels can change the outcome.
Question 2
True or False: The rate constant, k, is the same for all reactions.
- True
- False
💡 Hint: Remember, k is specific to a reaction at a set temperature.
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Challenge Problems
Push your limits with challenges.
Question 1
A reaction follows the rate law Rate = k [D]² [E]³. If the concentration of D is increased from 0.1 M to 0.2 M and the concentration of E is kept constant at 0.1 M, by what factor does the rate change?
💡 Hint: Consider the order of D in the rate law and how it affects the rate.
Question 2
You are given an experimental rate constant of k = 0.5 mol⁻² dm⁶ s⁻¹ for a reaction that has a first-order dependence on one reactant and second-order on another. If concentrations are [A]=0.5 and [B]=0.25, calculate the rate of reaction.
💡 Hint: Substitute the known values into the rate expression.
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