Chemistry: The Central Science 11th edition

Textbook Cover

Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward
Publisher: Pearson Education


Access is contingent on use of this textbook in the instructor's classroom.

Academic Term Homework
Higher Education Single Term $29.95
High School $10.50

Online price per student per course or lab, bookstore price varies. Access cards can be packaged with most any textbook, please see your textbook rep or contact WebAssign

  • Chapter 1: Introduction: Matter and Measurement
    • 1: Visualizing Concepts
    • 1: Classification and Properties of Matter (7)
    • 1: Units and Measurement (10)
    • 1: Uncertainty in Measurement (5)
    • 1: Dimensional Analysis (9)
    • 1: Additional Exercises (10)
    • WebAssign Answer Entry Tutorials (1)
    • Extra Problem (6)

  • Chapter 2: Atoms, Molecules, and Ions
    • 2: Visualizing Concepts
    • 2: Atomic Theory and the Discovery of Atomic Structure (4)
    • 2: Modern View of Atomic Structure; Atomic Weights (7)
    • 2: The Periodic Table; Molecules and Ions (12)
    • 2: Naming Inorganic Compounds; Organic Molecules (12)
    • 2: Additional Exercises (4)
    • WebAssign Answer Entry Tutorials (1)
    • Extra Problem (3)

  • Chapter 3: Stoichiometry: Calculations with Chemical Formulas and Equations
    • 3: Visualizing Concepts (1)
    • 3: Balancing Chemical Equations (4)
    • 3: Patterns of Chemical Reactivity (4)
    • 3: Formula Weights (4)
    • 3: Avogadro's Number and the Mole (9)
    • 3: Empirical Formulas (10)
    • 3: Calculations Based on Chemical Equations (8)
    • 3: Limiting Reactants; Theoretical Yields (7)
    • 3: Additional Exercises (9)
    • 3: Integrative Exercises (2)
    • WebAssign Answer Entry Tutorials (1)
    • Extra Problem (1)

  • Chapter 4: Aqueous Reactions and Solution Stoichiometry
    • 4: Visualizing Concepts
    • 4: Electrolytes (3)
    • 4: Precipitation Reactions and Net Ionic Equations (7)
    • 4: Acid-Base Reactions (8)
    • 4: Oxidation-Reduction Reactions (7)
    • 4: Solution Composition; Molarity (11)
    • 4: Solution Stoichiometry; Titrations (10)
    • 4: Additional Exercises (4)
    • 4: Integrative Exercises (2)
    • WebAssign Answer Entry Tutorials
    • Extra Problem (3)

  • Chapter 5: Thermochemistry
    • 5: Visualizing Concepts
    • 5: The Nature of Energy (4)
    • 5: The First Law of Thermodynamics (3)
    • 5: Enthalpy (10)
    • 5: Calorimetry (9)
    • 5: Hess's Law (1)
    • 5: Enthalpies of Formation (4)
    • 5: Foods and Fuels (5)
    • 5: Additional Exercises (4)
    • 5: Integrative Exercises
    • WebAssign Answer Entry Tutorials
    • Extra Problem

  • Chapter 6: Electronic Structure of Atoms
    • 6: Visualizing Concepts
    • 6: The Wave Nature of Light (4)
    • 6: Quantized Energy and Photons (6)
    • 6: Bohr's Model; Matter Waves (11)
    • 6: Quantum Mechanics and Atomic Orbitals (3)
    • 6: Many-Electron Atoms and Electron Configurations (5)
    • 6: Additional Exercises (6)
    • 6: Integrative Exercises (1)
    • WebAssign Answer Entry Tutorials
    • Extra Problem (4)

  • Chapter 7: Periodic Properties of the Elements
    • 7: Visualizing Concepts
    • 7: Periodic Table; Effective Nuclear Charge (2)
    • 7: Atomic and Ionic Radii (10)
    • 7: Ionization Energies; Electron Affinities (8)
    • 7: Properties of Metals and Nonmetals (6)
    • 7: Group Trends in Metals and Nonmetals (7)
    • 7: Additional Exercises (2)
    • 7: Integrative Exercises (2)
    • WebAssign Answer Entry Tutorials
    • Extra Problem (5)

  • Chapter 8: Basic Concepts of Chemical Bonding
    • 8: Visualizing Concepts (1)
    • 8: Lewis Symbols (4)
    • 8: Ionic Bonding (10)
    • 8: Covalent Bonding, Electronegativity, and Bond Polarity (12)
    • 8: Lewis Structures; Resonance Structures (7)
    • 8: Exceptions to the Octet Rule (3)
    • 8: Bond Enthalpies (5)
    • 8: Additional Exercises (6)
    • 8: Integrative Exercises (2)
    • WebAssign Answer Entry Tutorials (1)
    • Extra Problem (5)

  • Chapter 9: Molecular Geometry and Bonding Theories
    • 9: Visualizing Concepts
    • 9: Molecular Shapes; the VSEPR Model (10)
    • 9: Polarity of Polyatomic Molecules (6)
    • 9: Orbital Overlap; Hybrid Orbitals (2)
    • 9: Multiple Bonds (7)
    • 9: Molecular Orbitals (6)
    • 9: Additional Exercises (3)
    • 9: Integrative Exercises (3)
    • WebAssign Answer Entry Tutorials
    • Extra Problem (2)

  • Chapter 10: Gases
    • 10: Visualizing Concepts
    • 10: Gas Characteristics; Pressure (11)
    • 10: The Gas Laws (3)
    • 10: The Ideal-Gas Equation (9)
    • 10: Further Applications of the Ideal-Gas Equation (9)
    • 10: Partial Pressures (6)
    • 10: Kinetic Molecular Theory; Graham's Law (4)
    • 10: Nonideal-Gas Behavior (2)
    • 10: Additional Exercises (6)
    • 10: Integrative Exercises
    • WebAssign Answer Entry Tutorials
    • Extra Problem (2)

  • Chapter 11: Intermolecular Forces, Liquids, and Solids
    • 11: Visualizing Concepts
    • 11: Molecular Comparisons of Gases, Liquids, and Solids
    • 11: Intermolecular Forces (4)
    • 11: Viscosity and Surface Tension
    • 11: Phase Changes (5)
    • 11: Vapor Pressure and Boiling Point (3)
    • 11: Phase Diagrams (1)
    • 11: Structures of Solids (7)
    • 11: Bonding in Solids (4)
    • 11: Additional Exercises (1)
    • 11: Integrative Exercises (2)
    • WebAssign Answer Entry Tutorials
    • Extra Problem (3)

  • Chapter 12: Modern Materials
    • 12: Visualizing Concepts
    • 12: Classes of Materials and Electronic Structure of Materials (2)
    • 12: Semiconductors (2)
    • 12: Ceramics (2)
    • 12: Superconductors
    • 12: Polymers (5)
    • 12: Biomaterials (2)
    • 12: Liquid Crystals (4)
    • 12: Nanomaterials (3)
    • 12: Additional Exercises (4)
    • 12: Integrative Exercises (4)
    • WebAssign Answer Entry Tutorials
    • Extra Problem (1)

  • Chapter 13: Properties of Solutions
    • 13: Visualizing Concepts
    • 13: The Solution Process (3)
    • 13: Saturated Solutions; Factors Affecting Solubility (5)
    • 13: Concentrations of Solutions (16)
    • 13: Colligative Properties (11)
    • 13: Colloids
    • 13: Additional Exercises (2)
    • 13: Integrative Exercises
    • WebAssign Answer Entry Tutorials
    • Extra Problem

  • Chapter 14: Chemical Kinetics
    • 14: Visualizing Concepts
    • 14: Reaction Rates (4)
    • 14: Rate Laws (7)
    • 14: Change of Concentration with Time (4)
    • 14: Temperature and Rate (6)
    • 14: Reaction Mechanisms (3)
    • 14: Catalysis (2)
    • 14: Additional Exercises (7)
    • 14: Integrative Exercises (1)
    • WebAssign Answer Entry Tutorials
    • Extra Problem (1)

  • Chapter 15: Chemical Equilibrium
    • 15: Visualizing Concepts
    • 15: Equilibrium; The Equilibrium Constant (3)
    • 15: Calculating Equilibrium Constants (3)
    • 15: Applications of Equilibrium Constants (11)
    • 15: Le Châtelier's Principle (2)
    • 15: Additional Exercises (10)
    • 15: Integrative Exercises
    • WebAssign Answer Entry Tutorials
    • Extra Problem (1)

  • Chapter 16: Acid-Base Equilibria
    • 16: Visualizing Concepts
    • 16: Arrhenius and Brønsted-Lowry Acids and Bases (5)
    • 16: Autoionization of Water (3)
    • 16: The pH Scale (5)
    • 16: Strong Acids and Bases (6)
    • 16: Weak Acids (8)
    • 16: Weak Bases (4)
    • 16: The Kp - Kc Relationship; Acid-Base Properties of Salts (4)
    • 16: Acid-Base Character and Chemical Structure (1)
    • 16: Lewis Acids and Bases (2)
    • 16: Additional Exercises (1)
    • 16: Integrative Exercises
    • WebAssign Answer Entry Tutorials
    • Extra Problem (3)

  • Chapter 17: Additional Aspects of Aqueous Equilibria
    • 17: Visualizing Concepts
    • 17: Common-Ion Effect (2)
    • 17: Buffers (7)
    • 17: Acid-Base Titrations (10)
    • 17: Solubility Equilibria and Factors Affecting Solubility (8)
    • 17: Precipitation; Qualitative Analysis (4)
    • 17: Additional Exercises (5)
    • 17: Integrative Exercises
    • WebAssign Answer Entry Tutorials
    • Extra Problem (1)

  • Chapter 18: Chemistry of the Environment
    • 18: Visualizing Concepts
    • 18: Earth's Atmosphere (4)
    • 18: The Upper Atmosphere; Ozone (2)
    • 18: Chemistry of the Troposphere (2)
    • 18: The World Ocean (6)
    • 18: Freshwater (5)
    • 18: Green Chemistry
    • 18: Additional Exercises (6)
    • 18: Integrative Exercises (7)
    • WebAssign Answer Entry Tutorials
    • Extra Problem

  • Chapter 19: Chemical Thermodynamics
    • 19: Visualizing Concepts
    • 19: Spontaneous Processes (3)
    • 19: Entropy and the Second Law of Thermodynamics (5)
    • 19: The Molecular Interpretation of Entropy (5)
    • 19: Entropy Changes in Chemical Reactions (1)
    • 19: Gibbs Free Energy (10)
    • 19: Free Energy and Equilibrium (8)
    • 19: Additional Exercises (1)
    • 19: Integrative Exercises
    • WebAssign Answer Entry Tutorials
    • Extra Problem (3)

  • Chapter 20: Electrochemistry
    • 20: Visualizing Concepts
    • 20: Oxidation-Reduction Reactions (2)
    • 20: Balancing Oxidation-Reduction Reactions (3)
    • 20: Voltaic Cells (1)
    • 20: Cell EMF under Standard Conditions (5)
    • 20: Strengths of Oxidizing and Reducing Agents (5)
    • 20: Free Energy and Redox Reactions (5)
    • 20: Cell EMF under Nonstandard Conditions (5)
    • 20: Batteries and Fuel Cells (2)
    • 20: Corrosion
    • 20: Electrolysis; Electrical Work (6)
    • 20: Additional Exercises (2)
    • 20: Integrative Exercises
    • WebAssign Answer Entry Tutorials
    • Extra Problem

  • Chapter 21: Nuclear Chemistry
    • 21: Visualizing Concepts
    • 21: Radioactivity (7)
    • 21: Nuclear Stability (4)
    • 21: Nuclear Transmutations (4)
    • 21: Rates of Radioactive Decay (7)
    • 21: Energy Changes (5)
    • 21: Effects and Uses of Radioisotopes (4)
    • 21: Additional Exercises (6)
    • 21: Integrative Exercises (2)
    • WebAssign Answer Entry Tutorials
    • Extra Problem (3)

  • Chapter 22: Chemistry of the Nonmetals
    • 22: Visualizing Concepts
    • 22: Periodic Trends and Chemical Reactions (4)
    • 22: Hydrogen, the Noble Gases, and the Halogens (5)
    • 22: Oxygen and the Group 6A Elements (6)
    • 22: Nitrogen and the Group 5A Elements (7)
    • 22: Carbon, the Other Group 4A Elements, and Boron (5)
    • 22: Additional Exercises
    • 22: Integrative Exercises (4)
    • WebAssign Answer Entry Tutorials
    • Extra Problem (1)

  • Chapter 23: Metals and Metallurgy
    • 23: Visualizing Concepts
    • 23: Metallurgy (7)
    • 23: Metals and Alloys (2)
    • 23: Transition Metals (9)
    • 23: Additional Exercises (4)
    • 23: Integrative Exercises (8)
    • WebAssign Answer Entry Tutorials
    • Extra Problem (2)

  • Chapter 24: Chemistry of Coordination Compounds
    • 24: Visualizing Concepts
    • 24: Introduction to Metal Complexes (1)
    • 24: Polydentate Ligands; Nomenclature (3)
    • 24: Isomerism
    • 24: Color; Magnetism; Crystal-Field Theory (5)
    • 24: Additional Exercises (4)
    • 24: Integrative Exercises (6)
    • WebAssign Answer Entry Tutorials
    • Extra Problem (3)

  • Chapter 25: The Chemistry of Life: Organic and Biological Chemistry
    • 25: Visualizing Concepts
    • 25: Introduction to Organic Compounds; Hydrocarbons (6)
    • 25: Reactions of Hydrocarbons (2)
    • 25: Functional Groups and Chirality (7)
    • 25: Proteins (2)
    • 25: Carbohydrates and Lipids (2)
    • 25: Nucleic Acids
    • 25: Additional Exercises (6)
    • 25: Integrative Exercises (3)
    • WebAssign Answer Entry Tutorials
    • Extra Problem (8)

Questions Available within WebAssign

Most questions from this textbook are available in WebAssign. The online questions are identical to the textbook questions except for minor wording changes necessary for Web use. Whenever possible, variables, numbers, or words have been randomized so that each student receives a unique version of the question. This list is updated nightly.

Question Group Key
P - Problem
XP - Extra Problem
T - Tutorials & Templates


Question Availability Color Key
BLACK questions are available now
GRAY questions are under development


Group Quantity Questions
Chapter 1: Introduction: Matter and Measurement
1.P 41 011 012 014 015 018 019 020 023 024 025 026 027 028 029 030 031 032 033 034 035 036 040 043 044 045 047 048 049 050 053 054 058 059 061 065 070 071 072 074 076 077
1.T 1 001
1.XP 6 001 002 003 004 005 006
Chapter 2: Atoms, Molecules, and Ions
2.P 39 010 011 012 014 017 018 023 024 026 027 031 038 043 045 046 049 051 053 054 055 056 059 060 061 062 065 066 067 068 069 070 071 072 073 074 093 095 099 104
2.T 1 001
2.XP 3 001 002 003
Chapter 3: Stoichiometry: Calculations with Chemical Formulas and Equations
3.P 58 008.mrv 011 012 013 014 015 017 019 020 022 023 025 026 028 034 036 037 038 039 040 041 042 043 044 047 048 049 050 051 052 053 054 057 058 061 062 063 064 065 066 069 070 072 074 075 076 078 081 082 083 085 087 089 093 096 100 102 107
3.T 1 001
3.XP 1 001
Chapter 4: Aqueous Reactions and Solution Stoichiometry
4.P 52 011 016 018 019 020 021 022 023 024 025 035 038 039 040 041 042 043 044 046 050 051 052 054 055 056 061 062 064 067 068 070 073 074 076 077 078 079 080 081 082 083 084 085 086 087 088 092 096 101 102 108 112
4.XP 3 001 002 003
Chapter 5: Thermochemistry
5.P 40 013 014 015 016 025 026 030 035 036 037 040 041 042 043 044 045 046 048 049 051 052 054 054.alt 055 057 058 064 068 070 072 075 079 080 081 082 083 095 097 100 109
Chapter 6: Electronic Structure of Atoms
6.P 36 009 010 015 016 023 024 027 028 029 030 033 034 036 038 039 040 041 042 043 044 045 049 050 053 063 064 066 068 071 075 078 079 081 088 090 099
6.XP 4 001 002 003 004
Chapter 7: Periodic Properties of the Elements
7.P 37 015 016 017 019 020 023 024 025 026 030 035 036 039 040 045 046 047 048 049 050 058 060 061 064 067 068 070 072 073 074 076 079 082 090 104 107 109
7.XP 5 001 002 003 004 005
Chapter 8: Basic Concepts of Chemical Bonding
8.P 50 001 007 008 009 011.mrv 013.mrv 014.mrv 015 016 017 018 022 024 028 028.alt 030 031.mrv 032.mrv 033.mrv 036 037 038 039 040 041 042 044 045.mrv 046.mrv 049.mrv 050.mrv 053 054 056.mrv 060 063.mrv 064.mrv 065 066 068 070 071 078 080 086 088 089 090.mrv 102.mrv 103.mrv
8.T 1 001
8.XP 5 001 002 003 004 005
Chapter 9: Molecular Geometry and Bonding Theories
9.P 37 012 014 018 019 020 021 024 025 026 027 031 032 034 035 036 038 047 048 050 053 054 055 056 058 058.mrv 060 062 067 068 070 073 079 082 085 096 096.mrv 097
9.XP 2 001 002
Chapter 10: Gases
10.P 50 011 012 013 014 015 016 019 020 022 023 024 025 026 028 030 034 036 037 039 040 041 042 043 049 050 051 052 053 054 055 057 058 061 062 065 066 068 070 077 078 079 082 083 088 091 093 096 098 102 105
10.XP 2 001 002
Chapter 11: Intermolecular Forces, Liquids, and Solids
11.P 27 019 020 024 026 033 034 037 038 040 044 045 048 054 058 059 061 062 063 064 066 071 072 076 078 079 103 106
11.XP 3 001 002 003
Chapter 12: Modern Materials
12.P 28 007 008 016 023 027 029 039 043.mrv 045 047 050 052 053 058 059 064 065 068 070 071 075 077 079 082 084 085 087 088
12.XP 1 001
Chapter 13: Properties of Solutions
13.P 37 016 019 020 023 024 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047 048 052 054 058 059 062 064 067 070 072 073 074 075 078 090 094
Chapter 14: Chemical Kinetics
14.P 34 016 020 021 022 025 026 027 028 031 032 034 036 038 039 040 049 050 055 058 059 060 062 064 068 081 082 084 085 086 087 090 091 100 105
14.XP 1 001
Chapter 15: Chemical Equilibrium
15.P 29 011 016 018 030 032 034 036 038 040 042 043 043.alt 044 046 047 048 049 054 056 059 061 063 065 066 067 069 070 074 078
15.XP 1 001
Chapter 16: Acid-Base Equilibria
16.P 39 017 020 022 023 026 030 031 032 035 036 037 038 040 043 045 046 048 049 050 052 054 055 056 058 062 064 066 072 073 074 076 082 084 086 088 096 102 104 115
16.XP 3 001 002 003
Chapter 17: Additional Aspects of Aqueous Equilibria
17.P 36 017 018 021 022 025 026 027 028 030 036 037 037.alt 038 039 040 041 042 044 046 050 052 054 055 056 058 060 062 064 066 068 070 077 082 084 089 098
17.XP 1 001
Chapter 18: Chemistry of the Environment
18.P 32 011 012 013 014 015 016 025 027 031 032 033 034 035 036 039 040 041 043 044 052 060 061 063 064 065 069 070 073 075 079 081 082
Chapter 19: Chemical Thermodynamics
19.P 33 010 014 018 023 024 026 027 028 032 034 039 040 041 050 054 056 058 059 062 063 064 065 068 072 074 075 076 078 079 080 081 082 090
19.XP 3 001 002 003
Chapter 20: Electrochemistry
20.P 36 014 016 018 019 021 025 033 035 036 037 040 041 042 044 046 048 050 051 052 055 056 060 061 062 064 068 071 072 087 088 089 090 091 092 100 107
Chapter 21: Nuclear Chemistry
21.P 39 008 010 011 012 013 014 016 018 020 021 024 027 028 029 030 034 036 037 038 039 040 042 044 046 048 049 050 057 058 063 064 065 069 071 072 076 078 080 082
21.XP 3 001 002 003
Chapter 22: Chemistry of the Nonmetals
22.P 31 012 013 014 018 026 028 033 034 035 044 045 046 047 051.mrv 052.mrv 055 056 057.mrv 058.mrv 059 064 068 070 075 076 078 080.mrv 097 100 104 109.mrv
22.XP 1 001
Chapter 23: Metals and Metallurgy
23.P 30 008 012 014 017 018 020 022 024 029 038 041 042 045 046 047 048 050 052 060 068 072 073 074 076 077 079 080 082 083 084
23.XP 2 001 002
Chapter 24: Chemistry of Coordination Compounds
24.P 19 014 020 024 026 041 042 043 044 048 059 062 069 070 075 076 077 080 081 082
24.XP 3 001 002 003
Chapter 25: The Chemistry of Life: Organic and Biological Chemistry
25.P 28 008.mrv 016 018.mrv 019 024 028.mrv 032.mrv 038 040 042.mrv 044 044.mrv 046.mrv 047.mrv 051.mrv 057.mrv 058.mrv 064 065 080 080.mrv 083.mrv 086.mrv 091 091.mrv 097.mrv 098.mrv 100
25.XP 8 001 002 003 003.mrv 004 004.mrv 005 006
Total 983