Factors Affecting Reaction Rates: Catalysts and Inhibitors

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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?

Speeds up the rate of reaction Signup and view all the answers

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

Speeds up the rate of reaction Signup and view all the answers

What is the difference between heterogeneous and homogeneous catalysts?

Heterogeneous catalysts exist in a different physical state than the reaction, while homogeneous catalysts exist in the same state. Signup and view all the answers

Why must automobiles have catalytic converters?

To convert harmful gases from engine combustion into acceptable substances. Signup and view all the answers

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

Inhibitors prevent a catalyst from performing its function. Signup and view all the answers

Why are some substances able to act as inhibitors?

They raise the activation energy of reactions. Signup and view all the answers

What happens if inhibitors react with a catalyst?

The inhibitor destroys or prevents the catalyst from functioning. Signup and view all the answers

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

Catalysts Signup and view all the answers

Inhibitors are substances that _______________ reaction rates.

Completely stop Signup and view all the answers

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

Decreases the rate of reaction Signup and view all the answers

Which type of catalyst is consumed in a chemical reaction?

Inhibitor Signup and view all the answers

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

Decrease it Signup and view all the answers

What is the characteristic of a homogeneous catalyst?

It lowers the activation energy of a reaction Signup and view all the answers

How do inhibitors affect catalysts?

Inhibitors prevent the catalyst from functioning Signup and view all the answers

Which statement regarding catalytic converters is true?

The catalysts in a catalytic converter are heterogeneous Signup and view all the answers

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

To lower the activation energy Signup and view all the answers

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

Inhibitors raise the activation energy Signup and view all the answers