Chemistry: The Science in Context 4th edition

Textbook Cover

Thomas R. Gilbert, Rein V. Kirss, Natalie Foster, and Geoffrey Davies
Publisher: W. W. Norton


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 T: WebAssign Answer Templates and Tutorials
    • T: WebAssign Answer Templates and Tutorials (3)

  • Chapter 1: Matter and Energy: The Origin of the Universe
    • 1.1: Classes of Matter
    • 1.2: Matter: An Atomic View
    • 1.3: Mixtures and How to Separate Them
    • 1.4: A Framework for Solving Problems
    • 1.5: Properties of Matter
    • 1.6: States of Matter (7)
    • 1.7: The Scientific Method: Starting Off with a Bang
    • 1.8: Making Measurements and Expressing the Results
    • 1.9: Unit Conversions and Dimensional Analysis (17)
    • 1.10: Testing a Theory: The Big Bang Revisited (7)
    • 1: Visual Problems (2)
    • 1: Additional Problems (5)
    • 1: Extra Problems (13)

  • Chapter 2: Atoms, Ions, and Molecules: Matter Starts Here
    • 2.1: The Nuclear Model of Atomic Structure
    • 2.2: Isotopes
    • 2.3: Average Atomic Mass (7)
    • 2.4: The Periodic Table of the Elements (12)
    • 2.5: Trends in Compound Formation (3)
    • 2.6: Naming Compounds and Writing Formulas (17)
    • 2.7: Nucleosynthesis (1)
    • 2: Visual Problems
    • 2: Additional Problems (5)
    • 2: Extra Problems (3)

  • Chapter 3: Stoichiometry: Mass, Formulas, and Reactions
    • 3.1: Chemical Reactions and Earth's Early Atmosphere
    • 3.2: The Mole (21)
    • 3.3: Writing Balanced Chemical Equations (3)
    • 3.4: Combustion Reactions
    • 3.5: Stoichiometric Calculations and the Carbon Cycle (8)
    • 3.6: Determining Empirical Formulas from Percent Composition
    • 3.7: Empirical and Molecular Formulas Compared (4)
    • 3.8: Combustion Analysis (2)
    • 3.9: Limiting Reactants and Perfect Yield (7)
    • 3: Visual Problems
    • 3: Additional Problems (1)
    • 3: Extra Problems (15)

  • Chapter 4: Solution Chemistry: The Hydrosphere
    • 4.1: Solutions on Earth and Other Places
    • 4.2: Concentration Units (12)
    • 4.3: Dilutions (3)
    • 4.4: Electrolytes and Nonelectrolytes (4)
    • 4.5: Acid–Base Reactions: Proton Transfer (3)
    • 4.6: Titrations (6)
    • 4.7: Precipitation Reactions (7)
    • 4.8: Ion Exchange
    • 4.9: Oxidation–Reduction Reactions: Electron Transfer (7)
    • 4: Visual Problems
    • 4: Additional Problems
    • 4: Calcium: In the Limelight
    • 4: Extra Problems (14)

  • Chapter 5: Thermochemistry: Energy Changes in Reactions
    • 5.1: Energy: Basic Concepts and Definitions
    • 5.2: Systems, Surroundings, and Energy Transfer (8)
    • 5.3: Enthalpy and Enthalpy Changes (4)
    • 5.4: Heating Curves and Heat Capacity (8)
    • 5.5: Calorimetry: Measuring Heat Capacity and Enthalpies of Reaction (6)
    • 5.6: Hess's Law
    • 5.7: Standard Enthalpies of Formation and Reaction (8)
    • 5.8: Fuel Values and Food Values (2)
    • 5: Visual Problems (1)
    • 5: Additional Problems (14)
    • 5: Carbon: Diamonds, Graphite, and the Molecules of Life (1)
    • 5: Extra Problems (9)

  • Chapter 6: Properties of Gases: The Air We Breathe
    • 6.1: The Gas Phase
    • 6.2: Atmospheric Pressure (4)
    • 6.3: The Gas Laws (10)
    • 6.4: The Ideal Gas Law
    • 6.5: Gases in Chemical Reactions (10)
    • 6.6: Gas Density (3)
    • 6.7: Dalton's Law and Mixtures of Gases (3)
    • 6.8: The Kinetic Molecular Theory of Gases (7)
    • 6.9: Real Gases (4)
    • 6: Visual Problems
    • 6: Additional Problems (9)
    • 6: Nitrogen: Feeding Plants and Inflating Air Bags
    • 6: Extra Problems (23)

  • Chapter 7: A Quantum Model of Atoms: Waves and Particles
    • 7.1: Light Waves (5)
    • 7.2: Atomic Spectra
    • 7.3: Particles of Light and Quantum Theory (7)
    • 7.4: The Hydrogen Spectrum and the Bohr Model (5)
    • 7.5: Electron Waves (4)
    • 7.6: Quantum Numbers and Electron Spin
    • 7.7: The Sizes and Shapes of Atomic Orbitals (4)
    • 7.8: The Periodic Table and Filling the Orbitals of Multielectron Atoms
    • 7.9: Electron Configurations of Ions (10)
    • 7.10: The Sizes of Atoms and Ions (1)
    • 7.11: Ionization Energies
    • 7.12: Electron Affinities
    • 7: Visual Problems (3)
    • 7: Additional Problems (2)
    • 7: A Noble Family: Special Status for Special Behavior
    • 7: Extra Problems (6)

  • Chapter 8: Chemical Bonds: What Makes a Gas a Greenhouse Gas?
    • 8.1: Types of Chemical Bonds
    • 8.2: Lewis Structures (6)
    • 8.3: Polar Covalent Bonds (3)
    • 8.4: Vibrating Bonds and the Greenhouse Effect
    • 8.5: Resonance (2)
    • 8.6: Formal Charge: Choosing among Lewis Structures (3)
    • 8.7: Exceptions to the Octet Rule (3)
    • 8.8: The Lengths and Strengths of Covalent Bonds (3)
    • 8: Visual Problems
    • 8: Additional Problems (4)
    • 8: Fluorine and Oxygen: Location, Location, Location
    • 8: Extra Problems (17)

  • Chapter 9: Molecular Geometry: Shape Determines Function
    • 9.1: Molecular Shape
    • 9.2: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) (8)
    • 9.3: Polar Bonds and Polar Molecules (4)
    • 9.4: Valence Bond Theory (3)
    • 9.5: Shape and Interactions with Large Molecules
    • 9.6: Chirality and Molecular Recognition (1)
    • 9.7: Molecular Orbital Theory (7)
    • 9: Visual Problems
    • 9: Additional Problems (8)
    • 9: Chalcogens: From Alcohol to Asparagus, the Nose Knows (1)
    • 9: Extra Problems (13)

  • Chapter 10: Intermolecular Forces: The Uniqueness of Water
    • 10.1: Interactions between Ions (1)
    • 10.2: Interactions Involving Polar Molecules (4)
    • 10.3: Dispersion Forces (2)
    • 10.4: Polarity and Solubility (2)
    • 10.5: Vapor Pressure of Pure Liquids (2)
    • 10.6: Phase Diagrams: Intermolecular Forces at Work (8)
    • 10.7: Some Remarkable Properties of Water (2)
    • 10: Visual Problems
    • 10: Additional Problems (1)
    • 10: The Halogens: The Salt of the Earth
    • 10: Extra Problems (3)

  • Chapter 11: Solutions: Properties and Behavior
    • 11.1: Vapor Pressure of Solutions (1)
    • 11.2: Solubility of Gases in Water (3)
    • 11.3: Energy Changes during Formation and Dissolution of Ionic Compounds (2)
    • 11.4: Mixtures of Volatile Solutes (2)
    • 11.5: Colligative Properties of Solutions (8)
    • 11.6: Measuring the Molar Mass of a Solute Using Colligative Properties (1)
    • 11: Visual Problems
    • 11: Additional Problems (2)
    • 11: Extra Problems (1)

  • Chapter 12: Solids: Structures and Applications
    • 12.1: The Solid State
    • 12.2: Structures of Metals (7)
    • 12.3: Alloys (2)
    • 12.4: Metallic Bonds and Conduction Bands (2)
    • 12.5: Semiconductors (4)
    • 12.6: Salt Crystals: Ionic Solids (4)
    • 12.7: Structures of Nonmetals (1)
    • 12.8: Ceramics: Insulators to Superconductors (1)
    • 12.9: X-ray Diffraction: How We Know Crystal Structures (6)
    • 12: Visual Problems (2)
    • 12: Additional Problems (2)
    • 12: Silicon, Silica, Silicates, Silicone: What's in a Name?
    • 12: Extra Problems (11)

  • Chapter 13: Organic Chemistry: Fuels, Pharmaceuticals, Materials, and Life
    • 13.1: Carbon: The Scope of Organic Chemistry (3)
    • 13.2: Alkanes (7)
    • 13.3: Alkenes and Alkynes (4)
    • 13.4: Aromatic Compounds (3)
    • 13.5: Amines (1)
    • 13.6: Alcohols, Ethers, and Reformulated Gasoline (3)
    • 13.7: Carbonyl-Containing Compounds (8)
    • 13.8: Chirality (5)
    • 13: Visual Problems (6)
    • 13: Additional Problems (2)
    • 13: Extra Problems (2)

  • Chapter 14: Chemical Kinetics: Reactions in the Air We Breathe
    • 14.1: Cars, Trucks, and Air Quality
    • 14.2: Reaction Rates (4)
    • 14.3: Effect of Concentration on Reaction Rate (16)
    • 14.4: Reaction Rates, Temperature, and the Arrhenius Equation (3)
    • 14.5: Reaction Mechanisms (3)
    • 14.6: Catalysis (1)
    • 14: Visual Problems (4)
    • 14: Additional Problems (4)
    • 14: Extra Problems (5)

  • Chapter 15: Chemical Equilibrium: How Much Product Does a Reaction Really Make?
    • 15.1: The Dynamics of Chemical Equilibrium (2)
    • 15.2: Writing Equilibrium Constant Expressions
    • 15.3: Relationships between Kc and Kp Values (9)
    • 15.4: Manipulating Equilibrium Constant Expressions (3)
    • 15.5: Equilibrium Constants and Reaction Quotients (2)
    • 15.6: Heterogeneous Equilibria
    • 15.7: Le Châtelier's Principle (2)
    • 15.8: Calculations Based on K (12)
    • 15: Visual Problems
    • 15: Additional Problems
    • 15: Extra Problems (7)

  • Chapter 16: Acid–Base and Solubility Equilibria: Reactions in Soil and Water
    • 16.1: Acids and Bases: The Brønsted–Lowry Model (5)
    • 16.2: pH and the Autoionization of Water (3)
    • 16.3: Calculations Involving pH, Ka, and Kb (1)
    • 16.4: Polyprotic Acids (7)
    • 16.5: Acid Strength and Molecular Structure (1)
    • 16.6: pH of Salt Solutions (3)
    • 16.7: The Common-Ion Effect
    • 16.8: pH Buffers (6)
    • 16.9: Indicators and Acid–Base Titrations
    • 16.10: Solubility Equilibria (5)
    • 16: Visual Problems
    • 16: Additional Problems (2)
    • 16: The Chemistry of Two Strong Acids: Sulfuric and Nitric Acids (2)
    • 16: Extra Problems (14)

  • Chapter 17: Metal Ions: Colorful and Essential
    • 17.1: Lewis Acids and Bases (3)
    • 17.2: Complex Ions (3)
    • 17.3: Complex-Ion Equilibria (3)
    • 17.4: Naming Complex Ions and Coordination Compounds (3)
    • 17.5: Hydrated Metal Ions as Acids (5)
    • 17.6: Polydentate Ligands
    • 17.7: Ligand Strength and the Chelate Effect
    • 17.8: Crystal Field Theory (2)
    • 17.9: Magnetism and Spin States (2)
    • 17.10: Isomerism in Coordination Compounds
    • 17.11: Coordination Compounds in Biochemistry (2)
    • 17: Visual Problems (3)
    • 17: Additional Problems (3)
    • 17: Extra Problems (6)

  • Chapter 18: Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes
    • 18.1: Spontaneous Processes
    • 18.2: Thermodynamic Entropy (5)
    • 18.3: Absolute Entropy and the Third Law of Thermodynamics (1)
    • 18.4: Calculating Entropy Changes (1)
    • 18.5: Free Energy (5)
    • 18.6: Temperature and Spontaneity (1)
    • 18.7: Free Energy and Chemical Equilibrium
    • 18.8: Influence of Temperature on Equilibrium Constants (1)
    • 18.9: Driving the Human Engine: Coupled Reactions
    • 18.10: Microstates: A Quantized View of Entropy
    • 18: Visual Problems (2)
    • 18: Additional Problems (7)
    • 18: Extra Problems (16)

  • Chapter 19: Electrochemistry: The Quest for Clean Energy
    • 19.1: Redox Chemistry Revisited
    • 19.2: Electrochemical Cells (2)
    • 19.3: Standard Potentials (7)
    • 19.4: Chemical Energy and Electrical Work (2)
    • 19.5: A Reference Point: The Standard Hydrogen Electrode
    • 19.6: The Effect of Concentration on Ecell (6)
    • 19.7: Relating Battery Capacity to Quantities of Reactants (2)
    • 19.8: Corrosion: Unwanted Electrochemical Reactions
    • 19.9: Electrolytic Cells and Rechargeable Batteries (8)
    • 19.10: Fuel Cells
    • 19: Visual Problems (2)
    • 19: Additional Problems (2)
    • 19: Extra Problems (13)

  • Chapter 20: Biochemistry: The Compounds of Life
    • 20.1: The Composition of Proteins (1)
    • 20.2: Protein Structure and Function (2)
    • 20.3: Carbohydrates (2)
    • 20.4: Lipids (1)
    • 20.5: Nucleotides and Nucleic Acids (1)
    • 20.6: From Biomolecules to Living Cells
    • 20: Visual Problems (2)
    • 20: Additional Problems (1)
    • 20: Extra Problems (6)

  • Chapter 21: Nuclear Chemistry: Applications to Energy and Medicine
    • 21.1: Binding Energy and Nuclear Stability (2)
    • 21.2: Unstable Nuclei and Radioactive Decay (2)
    • 21.3: Rates of Radioactive Decay (2)
    • 21.4: Radiometric Dating (3)
    • 21.5: Measuring Radioactivity
    • 21.6: Biological Effects of Radioactivity (2)
    • 21.7: Medical Applications of Radionuclides (8)
    • 21.8: Nuclear Fission (2)
    • 21.9: Nuclear Fusion and the Quest for Clean Energy (1)
    • 21: Visual Problems
    • 21: Additional Problems (2)
    • 21: Extra Problems (17)

  • Chapter 22: Life and the Periodic Table
    • 22.1: The Periodic Table of Life (4)
    • 22.2: Major Essential Elements (4)
    • 22.3: Trace and Ultratrace Essential Elements (5)
    • 22.4: Nonessential Elements
    • 22.5: Elements for Diagnostics and Therapy (6)
    • 22: Visual Problems (5)
    • 22: Additional Problems
    • 22: Extra Problems (5)


Chemistry: The Science in Context fourth edition by Gilbert, Kirss, Foster, and Davies supports all kind of learners, regardless of how they use the book, by helping them connect chemistry to their world, see that world from a molecular point of view, and become expert problem solvers. WebAssign provides immediate student feedback for end-of-chapter questions straight from the textbook.

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 - End of Chapter Problem
T - Tutorial
XP - Extra Problem


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


Group Quantity Questions
Chapter T: WebAssign Answer Templates and Tutorials
T.T 3 001 002 003
Chapter 1: Matter and Energy: The Origin of the Universe
1.P 38 002 004 013 015 016 017 018 019 022 047 048 049 050 051 061 062 065 066 067 068 069 070 072 073 074 076 078 080 081 082 084 086 088 091 094 095 096 098
1.T 1 001
1.XP 13 001 002 003 004 005 006 007 008 009 010 011 012 013
Chapter 2: Atoms, Ions, and Molecules: Matter Starts Here
2.P 45 016 019 020 021 022 023 024 029 030 031 034 036 038 039 040 041 042 046 048 057 060 066 073 074 075 076 079 080 081 082 083 084 085 087 088 090 091 092 094 098 107 115 117 119 121
2.XP 3 001 002 003
Chapter 3: Stoichiometry: Mass, Formulas, and Reactions
3.P 46 017 018 019 020 021 022 023 024 025 026 029 030 032 034 035 036 037 038 039 040 042 050 052 054 058 060 061 062 063 064 067 068 078 084 086 088 098 100 108 109 110 111 112 113 114 135
3.XP 15 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015
Chapter 4: Solution Chemistry: The Hydrosphere
4.P 42 013 015 016 017 018 019 020 021 022 024 027 028 029 033 034 043 045 046 048 058 060 062 063 064 065 066 067 068 076 077 079 080 081 082 083 093 095 100 102 104 106 112
4.XP 14 001 002 003 004 005 006 007 008 009 010 011 012 013 014
Chapter 5: Thermochemistry: Energy Changes in Reactions
5.P 52 008 015 019 020 023 024 025 027 028 032 034 038 040 042 044 047 048 051 053 055 056 063 064 065 066 067 068 083 084 085 086 087 088 090 093 101 102 111 113 114 115 116 117 119 121 122 125 127 128 132 133 140
5.XP 9 001 002 003 004 005 006 007 008 009
Chapter 6: Properties of Gases: The Air We Breathe
6.P 50 033 034 035 036 049 050 055 056 061 062 065 066 067 068 070 072 073 075 076 077 079 080 083 084 090 092 094 097 110 111 122 124 128 131 132 134 136 138 142 143 144 156 158 161 162 164 165 166 167 179
6.XP 23 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023
Chapter 7: A Quantum Model of Atoms: Waves and Particles
7.P 41 002 004 008 027 030 031 032 034 039 044 045 046 047 049 050 056 062 064 065 066 071 072 074 077 082 086 089 090 098 100 102 103 104 105 106 108 112 114 122 136 140
7.XP 6 001 002 003 004 005 006
Chapter 8: Chemical Bonds: What Makes a Gas a Greenhouse Gas?
8.P 24 032 035 036 038 039 046 048 053 054 070 075 082 085 086 100 102 108 128 132 134 140 144 154 166
8.T 2 001 002
8.XP 17 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017
Chapter 9: Molecular Geometry: Shape Determines Function
9.P 32 022 025 026 029 030 031 032 038 042 046 047 048 057 058 064 077 090 092 093 094 098 099 100 101 109 111 113 115 117 119 123 127
9.XP 13 001 002 003 004 005 006 007 008 009 010 011 012 013
Chapter 10: Intermolecular Forces: The Uniqueness of Water
10.P 22 014 018 020 027 028 031 038 048 051 061 064 069 072 078 079 081 082 083 084 089 095 105
10.XP 3 001 002 003
Chapter 11: Solutions: Properties and Behavior
11.P 19 016 024 025 026 034 038 045 048 065 068 069 070 072 074 080 087 096 100 102
11.XP 1 001
Chapter 12: Solids: Structures and Applications
12.P 31 004 012 016 019 020 021 022 023 024 032 040 050 052 054 058 060 062 074 076 080 082 087 091 101 106 107 108 109 110 112 118
12.XP 11 001 002 003 004 005 006 007 008 009 010 011
Chapter 13: Organic Chemistry: Fuels, Pharmaceuticals, Materials, and Life
13.P 42 004 008 010 011 013 016 020 023 024 026 030 036 038 040 042 044 047 052 056 058 068 069 070 073 080 082 084 092 099 100 101 102 108 110 114 118 124 126 128 130 135 144
13.XP 2 001 002
Chapter 14: Chemical Kinetics: Reactions in the Air We Breathe
14.P 35 002 008 014 016 036 038 040 042 050 052 054 056 058 060 062 064 066 068 073 074 075 076 078 080 088 090 092 100 102 108 118 129 131 133 137
14.XP 5 001 002 003 004 005
Chapter 15: Chemical Equilibrium: How Much Product Does a Reaction Really Make?
15.P 30 015 016 021 024 025 026 030 031 032 034 036 042 045 046 054 056 074 075 081 083 084 086 087 089 090 091 094 095 097 098
15.XP 7 001 002 003 004 005 006 007
Chapter 16: Acid–Base and Solubility Equilibria: Reactions in Soil and Water
16.P 35 011 015 018 020 024 031 032 038 053 063 064 065 066 067 069 070 073 080 085 086 095 096 098 106 108 109 130 138 140 143 144 153 162 168 174
16.XP 14 001 002 003 004 005 006 007 008 009 010 011 012 013 014
Chapter 17: Metal Ions: Colorful and Essential
17.P 29 002 005 007 016 018 020 022 024 026 031 032 033 036 038 040 042 049 050 051 052 064 068 074 076 082 084 085 086 087
17.XP 6 001 002 003 004 005 006
Chapter 18: Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes
18.P 23 002 008 011 012 014 017 018 025 032 040 041 042 043 044 058 073 088 089 092 094 095 098 100
18.XP 16 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016
Chapter 19: Electrochemistry: The Quest for Clean Energy
19.P 31 003 005 017 018 028 029 030 034 035 036 039 042 044 046 047 048 052 053 056 062 064 075 076 077 078 079 080 081 082 089 092
19.XP 13 001 002 003 004 005 006 007 008 009 010 011 012 013
Chapter 20: Biochemistry: The Compounds of Life
20.P 10 002 008 018 023 026 040 042 054 062 068
20.XP 6 001 002 003 004 005 006
Chapter 21: Nuclear Chemistry: Applications to Energy and Medicine
21.P 24 014 016 022 024 033 034 040 046 048 053 054 061 062 064 065 066 067 068 070 074 075 082 088 096
21.XP 17 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017
Chapter 22: Life and the Periodic Table
22.P 24 002 004 006 008 010 020 021 022 023 034 036 038 040 054 055 056 058 062 083 086 088 089 090 092
22.XP 5 001 002 003 004 005
Total 950