Textbook Question
What is the molecularity of each of the following elementary reactions? Write the rate law for each. (a) Cl2(g) → 2 Cl(g)
Ch.14 - Chemical Kinetics
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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Table of contents
- Ch.1 - Introduction: Matter, Energy, and Measurement177
- Ch.2 - Atoms, Molecules, and Ions231
- Ch.3 - Chemical Reactions and Reaction Stoichiometry216
- Ch.4 - Reactions in Aqueous Solution189
- Ch.5 - Thermochemistry175
- Ch.6 - Electronic Structure of Atoms168
- Ch.7 - Periodic Properties of the Elements150
- Ch.8 - Basic Concepts of Chemical Bonding177
- Ch.9 - Molecular Geometry and Bonding Theories200
- Ch.10 - Gases179
- Ch.11 - Liquids and Intermolecular Forces113
- Ch.12 - Solids and Modern Materials154
- Ch.13 - Properties of Solutions157
- Ch.14 - Chemical Kinetics199
- Ch.15 - Chemical Equilibrium128
- Ch.16 - Acid-Base Equilibria164
- Ch.17 - Additional Aspects of Aqueous Equilibria163
- Ch.18 - Chemistry of the Environment105
- Ch.19 - Chemical Thermodynamics164
- Ch.20 - Electrochemistry171
- Ch.21 - Nuclear Chemistry122
- Ch.22 - Chemistry of the Nonmetals82
- Ch.23 - Transition Metals and Coordination Chemistry79
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry16
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Not the one you use?Change textbook
Chapter 14, Problem 67b
What is the molecularity of each of the following elementary reactions? Write the rate law for each. (b) OCl-(aq + H2O(l) → HOCl(aq) + OH-(aq)
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Determine the molecularity of the reaction by counting the number of reactant species involved in the elementary reaction.
In this reaction, identify the reactants: OCl^- (aq) and H2O (l).
Since there are two reactant species, the molecularity of the reaction is bimolecular.
For an elementary reaction, the rate law can be written directly from the molecularity.
The rate law for this bimolecular reaction is: rate = k[OCl^-][H2O], where k is the rate constant.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Molecularity
Molecularity refers to the number of reactant molecules involved in an elementary reaction. It can be classified as unimolecular (one molecule), bimolecular (two molecules), or termolecular (three molecules). Understanding molecularity is crucial for determining the rate law of a reaction, as it directly influences how the concentration of reactants affects the reaction rate.
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Molecular Polarity
Rate Law
The rate law expresses the relationship between the rate of a chemical reaction and the concentration of its reactants. It is typically formulated as rate = k[A]^m[B]^n, where k is the rate constant, and m and n are the orders of the reaction with respect to reactants A and B. For elementary reactions, the rate law can be directly derived from the stoichiometry of the reaction.
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Elementary Reaction
An elementary reaction is a single step process in a chemical reaction mechanism where reactants are converted to products in a single transition state. The molecularity of an elementary reaction is equal to its order, making it straightforward to write the rate law. Understanding elementary reactions is essential for analyzing complex reaction mechanisms and predicting reaction behavior.
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Related Practice
Textbook Question
(b) What is the difference between a unimolecular and a bimolecular elementary reaction?
Textbook Question
What is the molecularity of each of the following elementary reactions? Write the rate law for each. (c) NO(g) + Cl2(g) → NOCl2(g)
Textbook Question
What is the molecularity of each of the following elementary reactions? Write the rate law for each. (b)
Textbook Question
What is the molecularity of each of the following elementary reactions? Write the rate law for each.
(a) 2 NO(g) → N2O2(g)
(c) SO3(g) → SO2(g) + O(g)
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