Factors Affecting Reaction Rates: Catalysts and Inhibitors
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Questions and Answers

What effect does increasing the surface area of a reactant have on the rate of reaction?

  • Speeds up the rate of reaction (correct)
  • Halts the reaction completely
  • Decreases the rate of reaction
  • Has no effect on the rate of reaction

How does a catalyst affect the rate of a chemical reaction?

  • Stops the reaction from occurring
  • Reduces the rate of reaction
  • Does not affect the rate of reaction
  • Increases the rate of reaction (correct)

What is the role of an inhibitor in a chemical reaction?

  • Speeds up the reaction
  • Halts the reaction completely
  • Increases the activation energy barrier
  • Slows down or inhibits the reaction (correct)

How does increasing the temperature affect the rate of a reaction?

<p>Speeds up the rate of reaction (B)</p> Signup and view all the answers

What effect does a homogeneous catalyst have on a chemical reaction?

<p>Speeds up the rate of reaction (D)</p> Signup and view all the answers

What is the difference between heterogeneous and homogeneous catalysts?

<p>Heterogeneous catalysts exist in a different physical state than the reaction, while homogeneous catalysts exist in the same state. (D)</p> Signup and view all the answers

Why must automobiles have catalytic converters?

<p>To convert harmful gases from engine combustion into acceptable substances. (A)</p> Signup and view all the answers

What is true about the role of inhibitors in a reaction?

<p>Inhibitors prevent a catalyst from performing its function. (B)</p> Signup and view all the answers

Why are some substances able to act as inhibitors?

<p>They raise the activation energy of reactions. (B)</p> Signup and view all the answers

What happens if inhibitors react with a catalyst?

<p>The inhibitor destroys or prevents the catalyst from functioning. (A)</p> Signup and view all the answers

Which factor does NOT affect the rate of a reaction according to the text?

<p>Catalysts (D)</p> Signup and view all the answers

Inhibitors are substances that _______________ reaction rates.

<p>Completely stop (D)</p> Signup and view all the answers

What effect does decreasing the temperature of a reaction have on the rate of reaction?

<p>Decreases the rate of reaction (B)</p> Signup and view all the answers

Which type of catalyst is consumed in a chemical reaction?

<p>Inhibitor (C)</p> Signup and view all the answers

How do catalysts affect the activation energy needed for a reaction?

<p>Decrease it (D)</p> Signup and view all the answers

What is the characteristic of a homogeneous catalyst?

<p>It lowers the activation energy of a reaction (D)</p> Signup and view all the answers

How do inhibitors affect catalysts?

<p>Inhibitors prevent the catalyst from functioning (B)</p> Signup and view all the answers

Which statement regarding catalytic converters is true?

<p>The catalysts in a catalytic converter are heterogeneous (D)</p> Signup and view all the answers

What is the primary role of a catalyst in a reaction?

<p>To lower the activation energy (C)</p> Signup and view all the answers

How do inhibitors differ from catalysts in their impact on reactions?

<p>Inhibitors raise the activation energy (C)</p> Signup and view all the answers
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