Chemical Kinetics Quiz: Factors and Catalysts
16 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which factor does not affect the rate of a chemical reaction?

  • Concentration of reactants
  • Volume of the reaction vessel (correct)
  • Temperature
  • Surface area of reactants

    • What is the main function of a catalyst in a chemical reaction?

  • Increasing the activation energy
  • Slowing down the reaction
  • Initiating the reaction
  • Lowering the activation energy (correct)

    • In a chemical reaction, what happens to the concentration of reactants as the reaction proceeds?

  • Remains constant
  • Increases
  • Fluctuates randomly
  • Decreases (correct)

    • Which of the following statements correctly describes the rate of a chemical reaction?

    <p>The rate of a chemical reaction can be affected by the presence of a catalyst.</p> Signup and view all the answers

    What is the primary purpose of determining the rate law for a chemical reaction?

    <p>To determine how the concentration of reactants affects the rate of the reaction.</p> Signup and view all the answers

    What effect does an increase in temperature generally have on the rate of a chemical reaction?

    <p>The rate of the reaction increases as temperature provides more kinetic energy to reactant molecules.</p> Signup and view all the answers

    What is the relationship between the rate constant and the half-life of a first-order reaction?

    <p>They are inversely proportional</p> Signup and view all the answers

    What does the half-life of a first-order reaction describe?

    <p>Time required for the reactant concentration to decrease by half</p> Signup and view all the answers

    What is the unit of the rate constant for a first-order reaction?

    <p>M/1-s^(-1)</p> Signup and view all the answers

    Which factor does not affect the half-life of a first-order reaction?

    <p>Initial concentration of the reactant</p> Signup and view all the answers

    If two first-order reactions have different rate constants, which one will have a shorter half-life?

    <p>The reaction with the higher rate constant</p> Signup and view all the answers

    What is the relationship between the rate constant and the half-life of a first-order reaction?

    <p>As the rate constant increases, the half-life decreases</p> Signup and view all the answers

    How does the half-life of a first-order reaction change with a decrease in the rate constant?

    <p>The half-life increases</p> Signup and view all the answers

    Why is the half-life formula applicable to any first-order reaction?

    <p>Because the formula is independent of the rate constant</p> Signup and view all the answers

    What can the half-life of a first-order reaction help predict?

    <p>The time taken for a reactant to reach a certain percentage of its initial value</p> Signup and view all the answers

    In what way is the half-life related to the initial concentration of the reactant in a first-order reaction?

    <p>The initial concentration has no effect on the half-life</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser