Chemical Principles 7th 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 (3)
    • 2.2: The Nature of the Atom (3)
    • 2.3: Elements, Ions, and the Periodic Table (8)
    • 2.4: Nomenclature (6)
    • 2: Discussion Questions (2)
    • 2: Additional Exercises (8)
    • 2: Challenge Problems (4)
    • 2: Marathon Problem
    • 2: Chemwork Tutorials
    • 2: Extra Problems (6)
    • 2: WebAssign Answer Entry Tutorials (1)

  • Chapter 3: Stoichiometry
    • 3.1: Atomic Masses and the Mass Spectrometer (6)
    • 3.2: Moles and Molar Masses (7)
    • 3.3: Percent Composition (5)
    • 3.4: Empirical and Molecular Formulas (6)
    • 3.5: Balancing Chemical Equations (2)
    • 3.6: Reaction Stoichiometry (7)
    • 3.7: Limiting Reactants and Percent Yield (9)
    • 3: Discussion Questions (3)
    • 3: Additional Exercises (16)
    • 3: Challenge Problems (4)
    • 3: Marathon Problems
    • 3: Chemwork Tutorials
    • 3: Extra Problems (16)
    • 3: WebAssign Answer Entry Tutorials

  • Chapter 4: Types of Chemical Reactions and Solution Stoichiometry
    • 4.1: Aqueous Solutions: Strong and Weak Electrolytes
    • 4.2: Solution Concentration: Molarity (9)
    • 4.3: Precipitation Reactions (10)
    • 4.4: Acid-Base Reactions (11)
    • 4.5: Oxidation-Reduction Reactions (13)
    • 4: Discussion Questions (1)
    • 4: Additional Exercises (6)
    • 4: Challenge Problems (8)
    • 4: Marathon Problems (1)
    • 4: Chemwork Tutorials
    • 4: Extra Problems (12)
    • 4: WebAssign Answer Entry Tutorials

  • Chapter 5: Gases
    • 5.1: Pressure (4)
    • 5.2: Gas Laws (17)
    • 5.3: Gas Density, Molar Mass, and Reaction Stoichiometry (15)
    • 5.4: Kinetic Molecular Theory and Real Gases (17)
    • 5.5: Atmosphere Chemistry (2)
    • 5: Discussion Questions (5)
    • 5: Additional Exercises (14)
    • 5: Challenge Problems (13)
    • 5: Marathon Problem (1)
    • 5: Chemwork Tutorials
    • 5: Extra Problems (10)
    • 5: WebAssign Answer Entry Tutorials

  • Chapter 6: Chemical Equilbrium
    • 6.1: Characteristics of Chemical Equilibrium (2)
    • 6.2: The Equilibrium Constant (7)
    • 6.3: Equilibrium Calculations (12)
    • 6.4: Le Chatelier's Principle (3)
    • 6: Discussion Questions
    • 6: Additional Exercises (8)
    • 6: Challenge Problems (12)
    • 6: Marathon Problem (1)
    • 6: Chemwork Tutorials
    • 6: Extra Problems (6)
    • 6: WebAssign Answer Entry Tutorials

  • Chapter 7: Acids and Bases
    • 7.1: Nature of Acids and Bases (7)
    • 7.2: Autoionization of Water and pH Scale (4)
    • 7.3: Solutions of Acids (12)
    • 7.4: Solutions of Bases (8)
    • 7.5: Polyprotic Acids (4)
    • 7.6: Acid-Base Properties of Salts (7)
    • 7.7: Solutions of Dilute Acids and Bases (3)
    • 7: Discussion Questions
    • 7: Additional Exercises (9)
    • 7: Challenge Problems (7)
    • 7: Marathon Problems (1)
    • 7: Chemwork Tutorials
    • 7: Extra Problems (11)
    • 7: WebAssign Answer Entry Tutorials

  • Chapter 8: Applications of Aqueous Equilibria
    • 8.1: Buffers (18)
    • 8.2: Acid-Base Titrations (9)
    • 8.3: Indicators (4)
    • 8.4: Polyprotic Acid Titrations (6)
    • 8.5: Solubility Equilibria (14)
    • 8.6: Complex Ion Equilibria (7)
    • 8: Discussion Questions
    • 8: Additional Exercises (9)
    • 8: Challenge Problems (5)
    • 8: Marathon Problem (1)
    • 8: Chemwork Tutorials
    • 8: Extra Problems (10)
    • 8: WebAssign Answer Entry Tutorials

  • Chapter 9: Energy, Enthalpy, and Thermochemistry
    • 9.1: The Nature of Energy (6)
    • 9.2: Properties of Enthalpy (3)
    • 9.3: The Thermodynamics of Ideal Gases (4)
    • 9.4: Calorimetry and Heat Capacity (11)
    • 9.5: Hess's Law (4)
    • 9.6: Standard Enthalpies of Formation (7)
    • 9.7: Energy Consumption and Sources (4)
    • 9: Discussion Questions (1)
    • 9: Additional Exercises (5)
    • 9: Challenge Problems (5)
    • 9: Marathon Problems (1)
    • 9: Chemwork Tutorials
    • 9: Extra Problems (9)
    • 9: WebAssign Answer Entry Tutorials

  • Chapter 10: Spontaneity, Entropy, and Free Energy
    • 10.1: Spontaneity and Entropy (5)
    • 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 (13)
    • 10.4: Free Energy and Chemical Reactions (9)
    • 10.5: Free Energy: Pressure Dependence and Equilibrium (12)
    • 10.6: Adiabatic Processes (2)
    • 10: Discussion Questions
    • 10: Additional Exercises (12)
    • 10: Challenge Problems (10)
    • 10: Marathon Problems
    • 10: Chemwork Tutorials
    • 10: Extra Problems (7)
    • 10: WebAssign Answer Entry Tutorials

  • Chapter 11: Electrochemistry
    • 11.1: Galvanic Cells, Cell Potentials, and Standard Reduction Potentials (11)
    • 11.2: Cell Potential, Free Energy, and Equilibrium (10)
    • 11.3: Galvanic Cells: Concentration Dependence (11)
    • 11.4: Electrolysis (14)
    • 11: Discussion Questions
    • 11: Additional Exercises (5)
    • 11: Challenge Problems (8)
    • 11: Marathon Problems (1)
    • 11: Chemwork Tutorials
    • 11: Extra Problems (10)
    • 11: WebAssign Answer Entry Tutorials

  • Chapter 12: Quantum Mechanics and Atomic Theory
    • 12.1: Light and Matter (8)
    • 12.2: Hydrogen Atom: The Bohr Model (5)
    • 12.3: Wave Mechanics and Particle In a Box (5)
    • 12.4: Orbitals and Quantum Numbers (4)
    • 12.5: Polyelectronic Atoms (8)
    • 12.6: The Periodic Table and Periodic Properties (8)
    • 12.7: The Alkali Metals (2)
    • 12: Discussion Questions (1)
    • 12: Additional Exercises (8)
    • 12: Challenge Problems (4)
    • 12: Marathon Problem (1)
    • 12: Chemwork Tutorials
    • 12: Extra Problems (15)
    • 12: WebAssign Answer Entry Tutorials

  • Chapter 13: Bonding: General Concepts
    • 13.1: Chemical Bonds and Electronegativity (5)
    • 13.2: Ions and Ionic Compounds (11)
    • 13.3: Bond Energies (10)
    • 13.4: Lewis Structures and Resonance (10)
    • 13.5: Formal Charge (3)
    • 13.6: Molecular Structure and Polarity (6)
    • 13: Discussion Questions
    • 13: Additional Exercises (2)
    • 13: Challenge Problems (1)
    • 13: Marathon Problem
    • 13: Chemwork Tutorials
    • 13: Extra Problems (8)
    • 13: WebAssign Answer Entry Tutorials (2)

  • Chapter 14: Covalent Bonding: Orbitals
    • 14.1: The LE Model and Hybrid Orbitals (10)
    • 14.2: The MO Model (8)
    • 14.3: Spectroscopy (3)
    • 14: Discussion Questions (1)
    • 14: Additional Exercises (9)
    • 14: Challenge Problems (3)
    • 14: Marathon Problem (1)
    • 14: Chemwork Tutorials
    • 14: Extra Problems (6)
    • 14: WebAssign Answer Entry Tutorials

  • Chapter 15: Chemical Kinetics
    • 15.1: Reaction Rates (5)
    • 15.2: Rate Laws from Experimental Data: Initial-Rates Method (4)
    • 15.3: Integrated Rate Laws (18)
    • 15.4: Reaction Mechanisms (7)
    • 15.5: Temperature Dependence of Rate Constants and the Collision Model (8)
    • 15.6: Catalysis (6)
    • 15: Discussion Questions
    • 15: Additional Exercises (9)
    • 15: Challenge Problems (3)
    • 15: Marathon Problem
    • 15: Chemwork Tutorials
    • 15: Extra Problems (8)
    • 15: WebAssign Answer Entry Tutorials

  • Chapter 16: Liquids and Solids
    • 16.1: Intermolecular Forces and Physical Properties (5)
    • 16.2: Properties of Liquids (3)
    • 16.3: Structures and Properties of Solids (28)
    • 16.4: Phase Changes and Phase Diagrams (15)
    • 16: Discussion Questions (1)
    • 16: Additional Exercises (11)
    • 16: Challenge Problems (1)
    • 16: Marathon Problem (1)
    • 16: Chemwork Tutorials
    • 16: Extra Problems (14)
    • 16: WebAssign Answer Entry Tutorials

  • Chapter 17: Properties of Solutions
    • 17.1: Solution Composition (8)
    • 17.2: Thermodynamics of Solutions and Solubility (10)
    • 17.3: Vapor Pressures of Solutions (11)
    • 17.4: Colligative Properties (12)
    • 17.5: Properties of Electrolyte Solutions (10)
    • 17: Discussion Questions
    • 17: Additional Exercises (14)
    • 17: Challenge Problems (3)
    • 17: Marathon Problem
    • 17: Chemwork Tutorials
    • 17: Extra Problems (14)
    • 17: WebAssign Answer Entry Tutorials

  • Chapter 18: The Representative Elements
    • 18.1: Group 1A Elements (8)
    • 18.2: Group 2A Elements (6)
    • 18.3: Group 3A Elements (4)
    • 18.4: Group 4A Elements (4)
    • 18.5: Group 5A Elements (12)
    • 18.6: Group 6A Elements (4)
    • 18.7: Group 7A Elements (7)
    • 18.8: Group 8A Elements (3)
    • 18: Additional Exercises (7)
    • 18: Challenge Problems (6)
    • 18: Chemwork Tutorials
    • 18: Extra Problems (24)
    • 18: WebAssign Answer Entry Tutorials

  • Chapter 19: Transition Metals and Coordination Chemistry
    • 19.1: Transition Metals (3)
    • 19.2: Coordination Compounds (15)
    • 19.3: Bonding, Color, and Magnetism in Coordination Compounds (5)
    • 19: Discussion Questions
    • 19: Additional Exercises (11)
    • 19: Challenge Problems (2)
    • 19: Chemwork Tutorials
    • 19: Extra Problems (18)
    • 19: WebAssign Answer Entry Tutorials

  • Chapter 20: The Nucleus: A Chemist's View
    • 20.1: Radioactive Decay and Nuclear Transformations (7)
    • 20.2: Kinetics of Radioactive Decay (13)
    • 20.3: Energy Changes In Nuclear Reactions (8)
    • 20.4: Detection, Uses, and Health Effects of Radiation (5)
    • 20: Additional Exercises (5)
    • 20: Challenge Problems (4)
    • 20: Chemwork Tutorials
    • 20: Extra Problems (2)
    • 20: WebAssign Answer Entry Tutorials

  • Chapter 21: Organic and Biochemical Molecules
    • 21.1: Hydrocarbons (9)
    • 21.2: Isomerism (11)
    • 21.3: Functional Groups (10)
    • 21.4: Reactions of Organic Compounds (5)
    • 21.5: Polymers (1)
    • 21.6: Natural Polymers (10)
    • 21: Additional Exercises (8)
    • 21: Challenge Problems (1)
    • 21: Chemwork Tutorials
    • 21: Extra Problems (2)
    • 21: WebAssign Answer Entry Tutorials

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
AE - Additional Exercises
CP - Challenge Problems
E - Exercises
MP - Marathon Problem
CW - ChemWork Tutorials
T - Tutorials & Templates
DQ - Discussion Questions
XP - Extra Problems


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


Group Quantity Questions
Chapter 1: Chemists and Chemistry
1.T 1 001
Chapter 2: Atoms, Molecules, and Ions
2.AE 8 058 062 064 065 067 068 070 072
2.CP 4 076 077 078 079
2.DQ 2 009 011
2.E 20 019 020 024 026 027 029 033 034 040 041 042 044 045 046 050 051 052 054 055 056
2.T 1 001
2.XP 6 001 002 003 004 005 006
Chapter 3: Stoichiometry
3.AE 16 085 086 088 089 090 091 092 093 094 097 098 099 100 102 103 104
3.CP 4 109 110 112 114
3.DQ 3 006 010 011
3.E 42 023 026 027 028 029 031 034 035 036 037 038 039 040 043 044 046 047 048 050 054 055 056 058 060 064 065 067 068 069 070 071 072 074 076 077 078 079 080 081 082 083 084
3.XP 16 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016
Chapter 4: Types of Chemical Reactions and Solution Stoichiometry
4.AE 6 081 084 086 090 091 092
4.CP 8 096 098 099 100 102 105 106 108
4.DQ 1 006
4.E 43 016 017 022 023 024 025 026 027 028 036 038 039 041 042 043 044 045 046 047 048 050 051 052 054 056 057 058 060 061 062 065 066 068 070 071 072 073 074 075 076 077 079 080
4.MP 1 111
4.XP 12 001 002 003 004 005 006 007 008 009 010 011 012
Chapter 5: Gases
5.AE 14 109 112 113 114 118 119 120 121 124 125 126 127 129 131
5.CP 13 132 135 136 138 140 144 145 146 147 148 149 150 151
5.DQ 5 006 009 011 012 015
5.E 55 021 022 024 025 026 029 030 031 032 033 034 036 037 038 039 040 041 044 045 046 048 052 053 054 056 057 058 059 060 061 062 064 065 066 067 068 077 078 080 082 084 085 086 087 088 090 092 093 095 096 098 100 101 102 105
5.MP 1 154
5.XP 10 001 002 003 004 005 006 007 008 009 010
Chapter 6: Chemical Equilbrium
6.AE 8 063 064 066 067 068 070 074 076
6.CP 12 078 080 081 082 083 086 087 088 089 090 092 094
6.E 24 012 013 024 026 028 029 031 032 033 037 038 039 040 041 042 044 045 046 048 049 050 054 060 062
6.MP 1 096
6.XP 6 001 002 003 004 005 006
Chapter 7: Acids and Bases
7.AE 9 115 122 123 126 128 130 132 134 135
7.CP 7 136 143 144 146 147 150 151
7.E 45 020 021 024 026 029 030 031 032 036 037 038 039 042 046 048 050 052 054 056 057 058 060 062 063 064 066 068 070 076 080 082 085 086 088 090 093 094 101 104 105 106 108 110 112 114
7.MP 1 153
7.XP 11 001 002 003 004 005 006 007 008 009 010 011
Chapter 8: Applications of Aqueous Equilibria
8.AE 9 131 134 140 141 142 143 144 146 148
8.CP 5 152 154 158 164 166
8.E 58 021 022 023 025 026 027 028 032 033 034 036 038 040 044 046 048 049 051 054 059 061 062 063 064 068 069 070 074 075 076 082 084 085 086 087 088 090 093 094 095 096 098 100 101 102 104 107 108 110 113 114 120 121 122 124 126 127 128
8.MP 1 171
8.XP 10 001 002 003 004 005 006 007 008 009 010
Chapter 9: Energy, Enthalpy, and Thermochemistry
9.AE 5 083 086 087 088 091
9.CP 5 098 100 102 104 106
9.DQ 1 003
9.E 39 015 020 021 022 023 024 026 029 032 033 034 035 036 038 040 042 045 048 049 050 051 052 053 054 060 062 063 064 068 070 071 073 074 075 076 077 078 079 080
9.MP 1 107
9.XP 9 001 002 003 004 005 006 007 008 009
Chapter 10: Spontaneity, Entropy, and Free Energy
10.AE 12 097 099 100 103 104 106 108 110 114 117 118 120
10.CP 10 121 122 127 128 130 131 132 134 136 138
10.E 53 012 017 018 021 022 023 024 025 026 027 028 029 030 031 032 033 034 035 036 039 040 041 042 043 045 046 047 048 049 050 052 053 056 057 058 060 061 062 063 066 067 068 069 072 075 076 077 078 082 084 089 090 092
10.XP 7 001 002 003 004 005 006 007
Chapter 11: Electrochemistry
11.AE 5 091 095 096 098 100
11.CP 8 104 105 106 108 109 110 112 114
11.E 46 015 016 019 020 022 024 026 027 029 030 032 034 038 039 040 041 042 044 045 048 049 051 053 054 055 056 057 058 061 062 063 064 068 069 070 072 073 074 076 078 079 080 081 082 083 084
11.MP 1 116
11.XP 10 001 002 003 004 005 006 007 008 009 010
Chapter 12: Quantum Mechanics and Atomic Theory
12.AE 8 124 126 131 132 133 135 137 140
12.CP 4 142 145 148 149
12.DQ 1 001
12.E 40 021 022 027 029 032 033 034 035 040 041 042 046 047 052 053 054 056 057 061 064 069 070 075 076 077 078 080 090 091 092 097 098 100 102 106 108 110 111 116 118
12.MP 1 153
12.XP 15 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015
Chapter 13: Bonding: General Concepts
13.AE 2 109 111
13.CP 1 121
13.E 45 014 015 016 017 018 025 026 030 031 032 033 035 036 037 040 042 043 044 045 047 048 050 052 053 054 055 057 058 060 061 065 067 068 070 073 074 079 080 082 088 092 094 098 102 103
13.T 2 001 002
13.XP 8 001 002 003 004 005 006 007 008
Chapter 14: Covalent Bonding: Orbitals
14.AE 9 061 062 063 064 066 068 070 073 074
14.CP 3 076 077 080
14.DQ 1 004
14.E 21 010 012 018 021 022 024 025 026 027 028 040 041 042 044 046 048 050 053 055 056 057
14.MP 1 086
14.XP 6 001 002 003 004 005 006
Chapter 15: Chemical Kinetics
15.AE 9 098 099 100 102 103 104 105 106 108
15.CP 3 111 115 116
15.E 48 012 013 014 015 016 017 020 021 022 027 028 029 030 032 033 034 035 036 037 038 041 042 043 044 045 046 050 052 053 055 059 061 064 066 068 074 075 076 077 078 080 082 087 088 089 090 091 093
15.XP 8 001 002 003 004 005 006 007 008
Chapter 16: Liquids and Solids
16.AE 11 111 115 116 117 118 120 125 126 127 128 130
16.CP 1 134
16.DQ 1 010
16.E 51 012 015 019 020 024 028 031 032 033 037 038 039 040 041 043 044 045 046 047 048 049 050 051 055 056 057 058 063 064 065 066 067 068 070 072 075 076 079 080 082 084 086 088 091 092 093 094 095 096 098 102
16.MP 1 140
16.XP 14 001 002 003 004 005 006 007 008 009 010 011 012 013 014
Chapter 17: Properties of Solutions
17.AE 14 093 094 095 096 100 101 103 104 105 106 107 108 110 112
17.CP 3 114 120 122
17.E 51 014 015 016 018 019 020 021 022 026 028 029 030 032 033 035 037 038 039 040 041 044 045 046 047 048 049 051 052 053 059 060 061 062 063 064 065 066 068 069 071 072 075 076 077 078 083 084 085 086 087 088
17.XP 14 001 002 003 004 005 006 007 008 009 010 011 012 013 014
Chapter 18: The Representative Elements
18.AE 7 086 087 088 089 098 100 102
18.CP 6 105 107 108 110 112 113
18.E 48 001 002 003 004 006 009 010 011 012 014 016 018 019 020 023 024 025 026 031 032 033 034 038 042 043 047 048 049 053 054 055 056 058 059 062 064 065 069 070 071 073 074 075 076 077 079 080 081
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 11 067 068 071 072 075 076 078 079 080 081 082
19.CP 2 087 089
19.E 23 006 007 012 016 018 020 022 023 024 025 026 028 030 032 036 039 040 041 047 050 056 058 063
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 5 059 060 062 063 064
20.CP 4 068 070 071 072
20.E 33 002 008 009 010 011 012 014 015 016 017 018 019 020 021 025 026 027 028 029 030 031 032 034 035 036 038 039 040 041 044 048 049 055
20.XP 2 001 002
Chapter 21: Organic and Biochemical Molecules
21.AE 8 131 134 136 137 138 142 146 147
21.CP 1 155
21.E 46 008 010 011 012 013 014 015 016 017 020 022 025 027 028 029 030 031 032 033 034 037 038 039 040 042 044 045 046 049 050 056 057 058 061 062 080 094 096 098 102 106 116 119 120 123 126
21.XP 2 001 002
Total 1348