Chemistry 2e SENIOR CONTRIBUTING AUTHORS PAUL FLOWERS, UNIVERSITY OF NORTH CAROLINA AT PEMBROKE KLAUS THEOPOLD, UNIVERSITY OF DELAWARE RICHARD LANGLEY, STEPHEN F. AUSTIN STATE UNIVERSITY WILLIAM R. ROBINSON, PHD OpenStax Rice University 6100 Main Street MS-375 Houston, Texas 77005 To learn more about OpenStax, visit https://openstax.org. Individual print copies and bulk orders can be purchased through our website. ©2019 Rice University. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). 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The future of education. openstax.org Contents Preface 1 CHAPTER 1 Essential Ideas 9 Introduction 9 1.1Chemistry in Context 9 1.2Phases and Classification of Matter 14 1.3Physical and Chemical Properties 23 1.4Measurements 27 1.5Measurement Uncertainty, Accuracy, and Precision 33 1.6Mathematical Treatment of Measurement Results 41 Key Terms 48 Key Equations 49 Summary 49 Exercises 50 CHAPTER 2 Atoms, Molecules, and Ions 61 Introduction 61 2.1Early Ideas in Atomic Theory 62 2.2Evolution of Atomic Theory 66 2.3Atomic Structure and Symbolism 71 2.4Chemical Formulas 79 2.5The Periodic Table 84 2.6Ionic and Molecular Compounds 89 2.7Chemical Nomenclature 96 Key Terms 104 Key Equations 105 Summary 105 Exercises 107 CHAPTER 3 Composition of Substances and Solutions 117 Introduction 117 3.1Formula Mass and the Mole Concept 118 3.2Determining Empirical and Molecular Formulas 129 3.3Molarity 136 3.4Other Units for Solution Concentrations 144 Key Terms 150 Key Equations 150 Summary 150 Exercises 151 CHAPTER 4 Stoichiometry of Chemical Reactions 159 Introduction 159 4.1Writing and Balancing Chemical Equations 160 4.2Classifying Chemical Reactions 166 4.3Reaction Stoichiometry 180 4.4Reaction Yields 185 4.5Quantitative Chemical Analysis 190 Key Terms 198 Key Equations 199 Summary 199 Exercises 200 CHAPTER 5 Thermochemistry 211 Introduction 211 5.1Energy Basics 212 5.2Calorimetry 221 5.3Enthalpy 233 Key Terms 247 Key Equations 248 Summary 248 Exercises 248 CHAPTER 6 Electronic Structure and Periodic Properties of Elements 257 Introduction 257 6.1Electromagnetic Energy 258 6.2The Bohr Model 270 6.3Development of Quantum Theory 274 6.4Electronic Structure of Atoms (Electron Configurations) 287 6.5Periodic Variations in Element Properties 295 Key Terms 304 Key Equations 305 Summary 305 Exercises 307 CHAPTER 7 Chemical Bonding and Molecular Geometry 313 Introduction 313 7.1Ionic Bonding 313 7.2Covalent Bonding 317 7.3Lewis Symbols and Structures 322 7.4Formal Charges and Resonance 332 7.5Strengths of Ionic and Covalent Bonds 336 7.6Molecular Structure and Polarity 343 Key Terms 358 Key Equations 359 Summary 359 Access for free at openstax.org Exercises 360 CHAPTER 8 Advanced Theories of Covalent Bonding 375 Introduction 375 8.1Valence Bond Theory 376 8.2Hybrid Atomic Orbitals 379 8.3Multiple Bonds 390 8.4Molecular Orbital Theory 393 Key Terms 408 Key Equations 408 Summary 409 Exercises 409 CHAPTER 9 Gases 415 Introduction 415 9.1Gas Pressure 416 9.2Relating Pressure, Volume, Amount, and Temperature: The Ideal Gas Law 425 9.3Stoichiometry of Gaseous Substances, Mixtures, and Reactions 437 9.4Effusion and Diffusion of Gases 449 9.5The Kinetic-Molecular Theory 454 9.6Non-Ideal Gas Behavior 458 Key Terms 462 Key Equations 462 Summary 463 Exercises 464 CHAPTER 10 Liquids and Solids 475 Introduction 475 10.1Intermolecular Forces 476 10.2Properties of Liquids 487 10.3Phase Transitions 493 10.4Phase Diagrams 503 10.5The Solid State of Matter 510 10.6Lattice Structures in Crystalline Solids 516 Key Terms 534 Key Equations 535 Summary 535 Exercises 536 CHAPTER 11 Solutions and Colloids 547 Introduction 547 11.1The Dissolution Process 548 11.2Electrolytes 552 11.3Solubility 555 11.4Colligative Properties 564 11.5Colloids 583 Key Terms 592 Key Equations 593 Summary 593 Exercises 594 CHAPTER 12 Kinetics 599 Introduction 599 12.1Chemical Reaction Rates 600 12.2Factors Affecting Reaction Rates 605 12.3Rate Laws 607 12.4Integrated Rate Laws 614 12.5Collision Theory 625 12.6Reaction Mechanisms 630 12.7Catalysis 635 Key Terms 642 Key Equations 642 Summary 643 Exercises 644 CHAPTER 13 Fundamental Equilibrium Concepts 657 Introduction 657 13.1Chemical Equilibria 657 13.2Equilibrium Constants 660 13.3Shifting Equilibria: Le Châtelier’s Principle 669 13.4Equilibrium Calculations 675 Key Terms 683 Key Equations 683 Summary 683 Exercises 684 CHAPTER 14 Acid-Base Equilibria 693 Introduction 693 14.1Brønsted-Lowry Acids and Bases 693 14.2pH and pOH 697 14.3Relative Strengths of Acids and Bases 702 14.4Hydrolysis of Salts 716 14.5Polyprotic Acids 721 14.6Buffers 724 14.7Acid-Base Titrations 730 Key Terms 738 Key Equations 738 Summary 739 Exercises 740 Access for free at openstax.org