Chemical Kinetics: Rate and Order of Reaction

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Questions and Answers

What are the substances that go away over a period of time in a chemical reaction called?

  • Oxygen
  • Reactants (correct)
  • Combustion materials
  • Products

What term is used for the substances that are newly formed with a different set of properties from their original material in a chemical reaction?

  • Oxygen
  • Combustion materials
  • Products (correct)
  • Reactants

Which area of chemistry is concerned with the speed or rate at which chemical reactions occur?

  • Chemical kinetics (correct)
  • Physical chemistry
  • Inorganic chemistry
  • Organic chemistry

What determines the rate of a given chemical reaction?

<p>Temperature of the surroundings (A)</p> Signup and view all the answers

What factor can affect the rate of a chemical reaction by increasing the frequency of collisions between reactant molecules?

<p>Surface area of reactants (D)</p> Signup and view all the answers

Which factor can alter the rate of a chemical reaction by influencing the energy and frequency of collisions between reactant molecules?

<p>Concentration of reactants (B)</p> Signup and view all the answers

What is the relationship between the rate of the forward reaction and the rate of the backward reaction in a chemical equilibrium?

<p>The rate of the forward reaction equals the rate of the backward reaction (D)</p> Signup and view all the answers

According to the Brønsted-Lowry theory, what defines an acid?

<p>A substance that donates protons (D)</p> Signup and view all the answers

Which statement best describes a reversible reaction in a chemical equation?

<p>It uses a double-headed arrow to indicate simultaneous forward and backward reactions (C)</p> Signup and view all the answers

What does the power to which a reactant appears in its rate law expression determine?

<p>The reaction order of the reactant (C)</p> Signup and view all the answers

In chemical equilibrium, what happens to the concentrations of reactants and products?

<p>There is no net change in their concentrations (D)</p> Signup and view all the answers

How did Johannes Nicolaus Brønsted and Thomas Martin Lowry define acids and bases?

<p>Based on their ability to donate or accept protons (A)</p> Signup and view all the answers

Flashcards

Reactants

Substances that are consumed during a chemical reaction.

Products

Substances that are formed as a result of a chemical reaction.

Chemical Kinetics

The study of the rates and mechanisms of chemical reactions.

Reaction Rate

The measure of how fast a reaction proceeds.

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Chemical Equilibrium

A state in a chemical reaction where the rates of the forward and reverse reactions are equal.

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Catalyst

A substance that increases the rate of a chemical reaction without being consumed itself.

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Activation Energy

The minimum amount of energy required for a reaction to occur.

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Brønsted-Lowry Acid

A substance that donates a proton (H+) in a chemical reaction.

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Brønsted-Lowry Base

A substance that accepts a proton (H+) in a chemical reaction.

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Reversible Reaction

A reaction that can proceed in both the forward and reverse directions.

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Reaction Order

A measure of how much a reactant's concentration affects the rate of a reaction.

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Irreversible Reaction

A reaction that proceeds in only one direction and is not reversible.

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