Chemical Principles 8th edition

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Steven S. Zumdahl and Donald J. DeCoste
Publisher: Cengage Learning

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  • Chapter 1: Chemists and Chemistry
    • 1.1: Thinking Like a Chemist
    • 1.2: A Real-World Chemistry Problem
    • 1.3: The Scientific Method
    • 1.4: Industrial Chemistry
    • 1.5: Polyvinyl Chloride (PVC): Real-World Chemistry
    • 1: Chemwork Tutorials
    • 1: Extra Problems
    • 1: WebAssign Answer Entry Tutorials (1)

  • Chapter 2: Atoms, Molecules, and Ions
    • 2.1: Development of the Atomic Theory (5)
    • 2.2: The Nature of the Atom (4)
    • 2.3: Elements, Ions, and the Periodic Table (11)
    • 2.4: Nomenclature (11)
    • 2: Discussion Questions (3)
    • 2: Additional Exercises (16)
    • 2: Challenge Problems (5)
    • 2: Marathon Problem
    • 2: Chemwork Tutorials
    • 2: Extra Problems (5)
    • 2: WebAssign Answer Entry Tutorials (1)

  • Chapter 3: Stoichiometry
    • 3.1: Atomic Masses and the Mass Spectrometer (6)
    • 3.2: Moles and Molar Masses (9)
    • 3.3: Percent Composition (5)
    • 3.4: Empirical and Molecular Formulas (10)
    • 3.5: Balancing Chemical Equations (4)
    • 3.6: Reaction Stoichiometry (9)
    • 3.7: Limiting Reactants and Percent Yield (9)
    • 3: Discussion Questions (4)
    • 3: Additional Exercises (16)
    • 3: Challenge Problems (6)
    • 3: Marathon Problems
    • 3: Chemwork Tutorials
    • 3: Extra Problems (15)

  • Chapter 4: Types of Chemical Reactions and Solution Stoichiometry
    • 4.1: Aqueous Solutions: Strong and Weak Electrolytes (2)
    • 4.2: Solution Concentration: Molarity (14)
    • 4.3: Precipitation Reactions (18)
    • 4.4: Acid–Base Reactions (15)
    • 4.5: Oxidation–Reduction Reactions (14)
    • 4: Discussion Questions (2)
    • 4: Additional Exercises (13)
    • 4: Challenge Problems (8)
    • 4: Marathon Problems
    • 4: Chemwork Tutorials
    • 4: Extra Problems (13)

  • Chapter 5: Gases
    • 5.1: Pressure (5)
    • 5.2: Gas Laws (21)
    • 5.3: Gas Density, Molar Mass, and Reaction Stoichiometry (19)
    • 5.4: Kinetic Molecular Theory and Real Gases (18)
    • 5.5: Atmosphere Chemistry (4)
    • 5: Discussion Questions (6)
    • 5: Additional Exercises (21)
    • 5: Challenge Problems (13)
    • 5: Marathon Problem
    • 5: Chemwork Tutorials
    • 5: Extra Problems (12)

  • Chapter 6: Chemical Equilibrium
    • 6.1: Characteristics of Chemical Equilibrium (5)
    • 6.2: The Equilibrium Constant (12)
    • 6.3: Equilibrium Calculations (15)
    • 6.4: Le Châtelier's Principle (9)
    • 6: Discussion Questions
    • 6: Additional Exercises (18)
    • 6: Challenge Problems (12)
    • 6: Marathon Problem
    • 6: Chemwork Tutorials
    • 6: Extra Problems (7)

  • Chapter 7: Acids and Bases
    • 7.1: Nature of Acids and Bases (13)
    • 7.2: Autoionization of Water and pH Scale (8)
    • 7.3: Solutions of Acids (20)
    • 7.4: Solutions of Bases (16)
    • 7.5: Polyprotic Acids (7)
    • 7.6: Acid–Base Properties of Salts (14)
    • 7.7: Solutions of Dilute Acids and Bases (4)
    • 7: Discussion Questions
    • 7: Additional Exercises (17)
    • 7: Challenge Problems (7)
    • 7: Marathon Problems
    • 7: Chemwork Tutorials
    • 7: Extra Problems (13)

  • Chapter 8: Applications of Aqueous Equilibria
    • 8.1: Buffers (31)
    • 8.2: Acid–Base Titrations (14)
    • 8.3: Indicators (9)
    • 8.4: Polyprotic Acid Titrations (7)
    • 8.5: Solubility Equilibria (25)
    • 8.6: Complex Ion Equilibria (10)
    • 8: Discussion Questions
    • 8: Additional Exercises (18)
    • 8: Challenge Problems (5)
    • 8: Marathon Problem
    • 8: Chemwork Tutorials
    • 8: Extra Problems (16)

  • Chapter 9: Energy, Enthalpy, and Thermochemistry
    • 9.1: The Nature of Energy (10)
    • 9.2: Properties of Enthalpy (6)
    • 9.3: The Thermodynamics of Ideal Gases (3)
    • 9.4: Calorimetry and Heat Capacity (14)
    • 9.5: Hess's Law (7)
    • 9.6: Standard Enthalpies of Formation (11)
    • 9.7: Energy Consumption and Sources (6)
    • 9: Discussion Questions (1)
    • 9: Additional Exercises (14)
    • 9: Challenge Problems (5)
    • 9: Marathon Problems (1)
    • 9: Chemwork Tutorials
    • 9: Extra Problems (11)

  • Chapter 10: Spontaneity, Entropy, and Free Energy
    • 10.1: Spontaneity and Entropy (6)
    • 10.2: Energy, Enthalpy, and Entropy Changes Involving Ideal Gases and Physical Changes (12)
    • 10.3: Entropy and the Second Law of Thermodynamics: Free Energy (14)
    • 10.4: Free Energy and Chemical Reactions (10)
    • 10.5: Free Energy: Pressure Dependence and Equilibrium (17)
    • 10.6: Adiabatic Processes (2)
    • 10: Discussion Questions
    • 10: Additional Exercises (22)
    • 10: Challenge Problems (11)
    • 10: Marathon Problems
    • 10: Chemwork Tutorials
    • 10: Extra Problems (8)

  • Chapter 11: Electrochemistry
    • 11.1: Galvanic Cells, Cell Potentials, and Standard Reduction Potentials (15)
    • 11.2: Cell Potential, Free Energy, and Equilibrium (14)
    • 11.3: Galvanic Cells: Concentration Dependence (13)
    • 11.4: Electrolysis (18)
    • 11: Discussion Questions
    • 11: Additional Exercises (12)
    • 11: Challenge Problems (9)
    • 11: Marathon Problems (1)
    • 11: Chemwork Tutorials
    • 11: Extra Problems (12)

  • Chapter 12: Quantum Mechanics and Atomic Theory
    • 12.1: Light and Matter (15)
    • 12.2: Hydrogen Atom: The Bohr Model (12)
    • 12.3: Wave Mechanics and Particle in a Box (8)
    • 12.4: Orbitals and Quantum Numbers (9)
    • 12.5: Polyelectronic Atoms (17)
    • 12.6: The Periodic Table and Periodic Properties (15)
    • 12.7: The Alkali Metals (6)
    • 12: Discussion Questions (1)
    • 12: Additional Exercises (18)
    • 12: Challenge Problems (4)
    • 12: Marathon Problem
    • 12: Chemwork Tutorials
    • 12: Extra Problems (17)

  • Chapter 13: Bonding: General Concepts
    • 13.1: Chemical Bonds and Electronegativity (10)
    • 13.2: Ions and Ionic Compounds (16)
    • 13.3: Bond Energies (13)
    • 13.4: Lewis Structures and Resonance (14)
    • 13.5: Formal Charge (8)
    • 13.6: Molecular Structure and Polarity (13)
    • 13: Discussion Questions (1)
    • 13: Additional Exercises (12)
    • 13: Challenge Problems (3)
    • 13: Marathon Problem
    • 13: Chemwork Tutorials
    • 13: Extra Problems (9)
    • 13: WebAssign Answer Entry Tutorials (2)

  • Chapter 14: Covalent Bonding: Orbitals
    • 14.1: The LE Model and Hybrid Orbitals (17)
    • 14.2: The MO Model (19)
    • 14.3: Spectroscopy (6)
    • 14: Discussion Questions (1)
    • 14: Additional Exercises (10)
    • 14: Challenge Problems (5)
    • 14: Marathon Problem (1)
    • 14: Chemwork Tutorials
    • 14: Extra Problems (8)

  • Chapter 15: Chemical Kinetics
    • 15.1: Reaction Rates (7)
    • 15.2: Rate Laws from Experimental Data: Initial-Rates Method (8)
    • 15.3: Integrated Rate Laws (24)
    • 15.4: Reaction Mechanisms (11)
    • 15.5: Temperature Dependence of Rate Constants and the Collision Model (11)
    • 15.6: Catalysis (8)
    • 15: Discussion Questions
    • 15: Additional Exercises (16)
    • 15: Challenge Problems (4)
    • 15: Marathon Problem
    • 15: Chemwork Tutorials
    • 15: Extra Problems (8)

  • Chapter 16: Liquids and Solids
    • 16.1: Intermolecular Forces and Physical Properties (10)
    • 16.2: Properties of Liquids (4)
    • 16.3: Structures and Properties of Solids (37)
    • 16.4: Phase Changes and Phase Diagrams (21)
    • 16: Discussion Questions (1)
    • 16: Additional Exercises (19)
    • 16: Challenge Problems (2)
    • 16: Marathon Problem (1)
    • 16: Chemwork Tutorials
    • 16: Extra Problems (18)

  • Chapter 17: Properties of Solutions
    • 17.1: Solution Composition (10)
    • 17.2: Thermodynamics of Solutions and Solubility (10)
    • 17.3: Vapor Pressures of Solutions (13)
    • 17.4: Colligative Properties (9)
    • 17.5: Properties of Electrolyte Solutions (10)
    • 17: Discussion Questions
    • 17: Additional Exercises (14)
    • 17: Challenge Problems (5)
    • 17: Marathon Problem
    • 17: Chemwork Tutorials
    • 17: Extra Problems (19)

  • Chapter 18: The Representative Elements
    • 18.1: Group 1A Elements (8)
    • 18.2: Group 2A Elements (6)
    • 18.3: Group 3A Elements (5)
    • 18.4: Group 4A Elements (6)
    • 18.5: Group 5A Elements (15)
    • 18.6: Group 6A Elements (5)
    • 18.7: Group 7A Elements (7)
    • 18.8: Group 8A Elements (4)
    • 18: Additional Exercises (9)
    • 18: Challenge Problems (6)
    • 18: Chemwork Tutorials
    • 18: Extra Problems (24)

  • Chapter 19: Transition Metals and Coordination Chemistry
    • 19.1: Transition Metals (5)
    • 19.2: Coordination Compounds (17)
    • 19.3: Bonding, Color, and Magnetism in Coordination Compounds (8)
    • 19: Discussion Questions
    • 19: Additional Exercises (12)
    • 19: Challenge Problems (2)
    • 19: Chemwork Tutorials
    • 19: Extra Problems (18)

  • Chapter 20: The Nucleus: A Chemist's View
    • 20.1: Radioactive Decay and Nuclear Transformations (12)
    • 20.2: Kinetics of Radioactive Decay (16)
    • 20.3: Energy Changes In Nuclear Reactions (9)
    • 20.4: Detection, Uses, and Health Effects of Radiation (7)
    • 20: Additional Exercises (8)
    • 20: Challenge Problems (4)
    • 20: Chemwork Tutorials
    • 20: Extra Problems (5)

  • Chapter 21: Organic and Biochemical Molecules
    • 21.1: Hydrocarbons (11)
    • 21.2: Isomerism (13)
    • 21.3: Functional Groups (11)
    • 21.4: Reactions of Organic Compounds (6)
    • 21.5: Polymers (3)
    • 21.6: Natural Polymers (10)
    • 21: Additional Exercises (9)
    • 21: Challenge Problems (1)
    • 21: Chemwork Tutorials
    • 21: Extra Problems (2)


Chemical Principles 8th edition, by Steven S. Zumdahl and Donald J. DeCoste, provides a rigorous but understandable introduction to chemistry that emphasizes conceptual understanding and the importance of models. Known for helping students develop a qualitative, conceptual foundation that gets them thinking like chemists, this market-leading resource is designed for students with solid mathematical preparation. This edition features a new section on "Solving a Complex Problem" that discusses how to solve problems in a creative way based on understanding the fundamental ideas of chemistry.

The WebAssign component includes over 1850 end-of-chapter problems with links to the eBook.

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Group Quantity Questions
Chapter 1: Chemists and Chemistry
1.T 1 001
Chapter 2: Atoms, Molecules, and Ions
2.AE 16 063 064 067 068 070 071 072 075 076 077 078 079 080 082 084 085
2.CP 5 089 090 091 092 093
2.DQ 3 006 009 011
2.E 31 018 019 020 024 025 026 027 029 030 033 034 036 040 041 042 043 044 046 047 048 051 052 053 054 055 056 057 058 059 060 061
2.T 1 001
2.XP 5 001 002 003 004 005
Chapter 3: Stoichiometry
3.AE 16 093 094 096 097 098 099 100 101 102 105 106 107 108 110 111 112
3.CP 6 125 126 128 129 130 134
3.DQ 4 005 006 010 011
3.E 52 023 026 027 028 029 031 032 033 034 035 036 037 038 039 040 043 044 046 047 048 050 051 052 054 057 058 059 060 061 062 065 067 068 069 071 072 074 075 076 077 078 079 080 082 083 084 085 086 087 088 089 090
3.XP 15 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015
Chapter 4: Types of Chemical Reactions and Solution Stoichiometry
4.AE 13 091 093 096 097 098 100 101 102 104 109 110 113 114
4.CP 8 118 120 121 122 124 127 128 129
4.DQ 2 006 010
4.E 63 016 017 019 020 021 022 023 024 025 026 027 028 029 030 031 032 034 035 037 038 039 041 042 044 045 046 047 049 050 051 052 053 054 055 056 057 058 059 060 061 062 064 066 067 068 069 070 071 072 075 076 078 079 080 081 082 083 084 085 086 087 089 090
4.XP 13 001 002 003 004 005 006 007 008 009 010 011 012 013
Chapter 5: Gases
5.AE 21 113 114 115 117 118 119 120 122 123 124 125 126 127 130 131 132 133 135 136 137 143
5.CP 13 146 149 150 152 154 158 159 160 161 162 163 164 165
5.DQ 6 005 006 009 011 012 015
5.E 67 021 022 023 024 025 026 029 030 031 032 033 034 035 036 037 038 039 040 041 042 043 046 047 048 049 050 052 054 055 056 058 059 060 061 062 063 064 065 066 067 069 070 071 072 073 080 081 082 084 085 086 088 090 091 092 094 096 097 099 100 102 104 105 106 109 110 111
5.XP 12 001 002 003 004 005 006 007 008 009 010 011 012
Chapter 6: Chemical Equilibrium
6.AE 18 070 071 072 073 074 075 076 077 080 081 082 083 084 086 087 088 091 092
6.CP 12 010 096 098 099 100 104 105 106 107 108 110 112
6.E 41 011 012 013 014 015 021 024 026 027 028 029 030 031 032 033 034 035 038 039 040 042 043 044 045 046 048 049 050 051 052 053 054 055 058 059 062 064 065 066 067 068
6.XP 7 001 002 003 004 005 006 007
Chapter 7: Acids and Bases
7.AE 17 125 126 127 129 130 131 132 133 135 136 138 140 142 143 144 146 151
7.CP 7 152 159 160 162 163 166 167
7.E 82 018 021 022 023 024 025 026 027 028 030 031 032 033 034 035 036 037 038 040 041 042 043 044 046 048 049 050 051 052 054 056 057 058 059 060 062 063 064 066 067 068 069 070 072 073 074 076 077 078 079 080 082 083 085 086 087 088 089 090 093 094 096 097 098 099 101 102 104 106 107 109 110 112 113 114 115 116 118 120 122 123 124
7.XP 13 001 002 003 004 005 006 007 008 009 010 011 012 013
Chapter 8: Applications of Aqueous Equilibria
8.AE 18 139 140 142 145 148 150 151 153 154 155 156 157 158 165 168 170 171 174
8.CP 5 175 178 182 186 188
8.E 96 017 018 021 022 023 025 026 027 028 029 030 031 032 033 034 035 036 037 038 040 041 042 044 045 046 047 048 049 050 051 053 056 057 059 061 063 064 065 066 067 068 070 071 072 073 075 076 077 078 079 080 082 083 084 086 087 088 089 090 091 092 093 097 098 099 100 101 102 103 104 105 106 107 108 110 111 112 115 116 117 118 119 120 121 122 123 126 127 128 129 130 132 133 134 135 136
8.XP 16 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016
Chapter 9: Energy, Enthalpy, and Thermochemistry
9.AE 14 091 092 094 095 096 097 098 099 101 102 103 105 110 115
9.CP 5 116 118 120 122 124
9.DQ 1 003
9.E 57 015 018 020 021 023 024 025 026 027 028 032 033 034 035 036 038 039 040 042 043 044 046 048 050 051 052 054 055 056 057 058 059 060 061 064 066 067 068 069 070 071 073 074 075 076 077 078 079 080 081 082 085 086 087 088 089 090
9.MP 1 125
9.XP 11 001 002 003 004 005 006 007 008 009 011 012
Chapter 10: Spontaneity, Entropy, and Free Energy
10.AE 22 101 102 103 104 105 106 108 109 110 111 112 114 115 116 120 121 123 124 125 126 132 134
10.CP 11 135 136 141 142 143 144 145 146 148 150 152
10.E 61 012 017 018 020 021 022 023 024 025 026 027 028 029 030 031 032 033 034 035 036 041 042 043 044 045 046 047 048 049 050 051 052 054 055 057 059 060 061 062 063 064 065 068 069 070 071 073 074 077 078 079 080 081 084 086 088 089 090 091 092 094
10.XP 8 001 002 003 004 005 006 007 008
Chapter 11: Electrochemistry
11.AE 12 097 099 103 105 106 108 109 111 113 114 116 118
11.CP 9 120 121 122 124 125 126 128 130 131
11.E 60 015 016 017 019 020 022 023 024 025 026 027 028 029 030 032 034 037 038 039 040 041 042 043 044 046 047 048 050 051 053 055 056 057 059 060 061 062 065 066 067 068 069 072 073 074 075 076 078 080 081 082 083 084 086 087 088 089 090 091 092
11.MP 1 132
11.XP 12 001 002 003 004 005 006 007 008 009 010 011 012
Chapter 12: Quantum Mechanics and Atomic Theory
12.AE 18 131 132 133 134 135 136 138 139 140 141 142 143 145 146 147 148 153 157
12.CP 4 158 161 164 165
12.DQ 1 001
12.E 82 021 022 023 024 025 026 027 028 029 030 031 034 035 036 037 040 041 042 043 044 045 046 047 048 049 050 051 052 053 056 057 058 059 060 061 062 064 065 066 067 068 069 073 074 075 077 078 079 080 081 082 084 086 087 088 089 090 093 096 097 098 099 103 104 105 106 107 108 110 112 113 114 116 118 119 120 122 123 124 125 126 127
12.XP 17 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017
Chapter 13: Bonding: General Concepts
13.AE 12 112 113 117 119 120 121 122 124 125 127 128 131
13.CP 3 135 137 138
13.DQ 1 011
13.E 74 014 016 017 018 019 020 021 022 023 025 028 029 030 031 032 033 034 035 037 038 039 040 041 043 044 046 047 048 049 050 052 053 054 055 056 058 059 060 061 063 064 066 067 069 071 073 074 075 076 078 079 080 081 084 085 086 087 088 089 091 092 094 095 096 098 099 100 102 105 106 107 109 110 111
13.T 2 001 002
13.XP 9 001 002 003 004 005 006 007 008 009
Chapter 14: Covalent Bonding: Orbitals
14.AE 10 065 067 068 070 072 074 076 077 078 086
14.CP 5 087 088 089 091 092
14.DQ 1 004
14.E 42 010 012 014 017 019 020 022 023 024 026 027 028 029 030 031 032 033 034 035 038 039 042 043 044 045 046 047 048 049 050 051 052 053 054 056 057 059 060 061 062 063 064
14.MP 1 098
14.XP 8 001 002 003 004 005 006 007 008
Chapter 15: Chemical Kinetics
15.AE 16 102 104 105 106 107 108 109 110 111 112 115 116 119 120 122 124
15.CP 4 127 131 132 135
15.E 69 011 012 013 014 015 016 017 018 020 021 022 023 024 025 027 029 030 031 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047 048 049 051 053 054 056 057 059 061 063 064 065 066 068 070 071 072 076 079 080 081 082 083 084 085 086 088 091 093 094 095 096 097 098 099
15.XP 8 001 002 003 004 005 006 007 008
Chapter 16: Liquids and Solids
16.AE 19 115 117 118 119 120 121 122 123 124 125 127 128 129 130 131 132 134 138 144
16.CP 2 148 151
16.DQ 1 010
16.E 72 012 015 016 017 018 019 020 023 024 025 027 028 031 032 033 034 037 038 040 041 042 043 045 046 047 048 049 050 051 052 053 054 057 058 059 060 061 064 065 066 067 068 069 070 071 072 074 076 077 078 079 080 083 084 086 087 090 092 093 094 095 096 097 098 100 101 102 103 104 105 106 107
16.MP 1 154
16.XP 18 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018
Chapter 17: Properties of Solutions
17.AE 14 097 098 099 100 103 104 105 109 110 111 112 113 114 116 117 118 121
17.CP 5 127 128 132 134 136
17.E 52 014 015 016 017 018 019 020 021 022 023 025 028 029 030 031 032 033 034 035 037 039 040 041 042 043 044 046 047 048 049 050 051 052 053 054 055 056 057 061 062 063 064 066 068 070 071 073 074 079 080 081 082 086 087 088 089 090 091 092
17.XP 19 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019
Chapter 18: The Representative Elements
18.AE 9 094 095 096 097 101 105 106 110 112
18.CP 6 125 127 128 130 132 133
18.E 56 001 002 003 004 006 009 010 011 012 014 016 018 019 020 023 024 025 026 028 035 036 037 038 039 040 042 046 047 049 050 051 052 053 055 057 058 059 060 062 063 066 068 069 073 075 076 077 079 080 081 082 083 085 086 087 090
18.XP 24 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024
Chapter 19: Transition Metals and Coordination Chemistry
19.AE 12 070 075 076 078 079 080 082 083 084 086 087 088 089 090 092
19.CP 2 101 103
19.E 30 006 007 010 012 015 016 018 019 020 021 022 023 024 025 026 028 029 030 031 032 033 034 035 036 038 039 040 041 042 043 044 046 047 048 050 051 052 053 054 055 057 058 059 060 061 062 063 064 066 067 068
19.XP 18 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018
Chapter 20: The Nucleus: A Chemist's View
20.AE 8 061 063 065 066 069 070 075 076
20.CP 4 080 082 083 084
20.E 44 002 005 006 007 008 009 011 012 013 014 015 016 017 018 019 020 021 022 023 024 026 027 028 029 031 032 033 034 035 036 037 038 039 040 041 043 044 045 047 048 052 053 057 059
20.XP 5 001 002 003 004 005
Chapter 21: Organic and Biochemical Molecules
21.AE 9 131 134 136 137 138 143 148 152 153
21.CP 1 173
21.E 54 005 008 009 010 011 012 013 014 015 016 017 020 022 023 025 026 027 028 029 030 031 032 033 034 037 038 039 040 042 043 044 045 046 049 050 056 057 058 061 062 065 072 073 080 094 096 098 102 106 116 119 120 123 126
21.XP 2 001 002
Total 1864 (34)