Preface
Welcome to Chemistry 2e, an OpenStax resource. This textbook was written to increase student access to high-quality learning materials, maintaining highest standards of academic rigor at little to no cost.
About OpenStax
OpenStax is a nonprofit based at Rice University, and it’s our mission to improve student access to education. Our first openly licensed college textbook was published in 2012, and our library has since scaled to over 25 books for college and AP® courses used by hundreds of thousands of students. OpenStax Tutor, our low-cost personalized learning tool, is being used in college courses throughout the country. Through our partnerships with philanthropic foundations and our alliance with other educational resource organizations, OpenStax is breaking down the most common barriers to learning and empowering students and instructors to succeed.
About OpenStax resources
Customization
Chemistry 2e is licensed under a Creative Commons Attribution 4.0 International (CC BY) license, which means that you can distribute, remix, and build upon the content, as long as you provide attribution to OpenStax and its content contributors.
Because our books are openly licensed, you are free to use the entire book or pick and choose the sections that are most relevant to the needs of your course. Feel free to remix the content by assigning your students certain chapters and sections in your syllabus, in the order that you prefer. You can even provide a direct link in your syllabus to the sections in the web view of your book.
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Errata
All OpenStax textbooks undergo a rigorous review process. However, like any professional-grade textbook, errors sometimes occur. Since our books are web based, we can make updates periodically when deemed pedagogically necessary. If you have a correction to suggest, submit it through the link on your book page on OpenStax.org. Subject matter experts review all errata suggestions. OpenStax is committed to remaining transparent about all updates, so you will also find a list of past errata changes on your book page on OpenStax.org.
Format
You can access this textbook for free in web view or PDF through OpenStax.org, and for a low cost in print.
About Chemistry 2e
Chemistry 2e is designed to meet the scope and sequence requirements of the two-semester general chemistry course. The textbook provides an important opportunity for students to learn the core concepts of chemistry and understand how those concepts apply to their lives and the world around them. The book also includes a number of innovative features, including interactive exercises and real-world applications, designed to enhance student learning. The second edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Substantial improvements have been made in the figures, illustrations, and example exercises that support the text narrative.
Coverage and scope
Our Chemistry 2e textbook adheres to the scope and sequence of most general chemistry courses nationwide. We strive to make chemistry, as a discipline, interesting and accessible to students. With this objective in mind, the content of this textbook has been developed and arranged to provide a logical progression from fundamental to more advanced concepts of chemical science. Topics are introduced within the context of familiar experiences whenever possible, treated with an appropriate rigor to satisfy the intellect of the learner, and reinforced in subsequent discussions of related content. The organization and pedagogical features were developed and vetted with feedback from chemistry educators dedicated to the project.
Changes to the second edition
OpenStax only undertakes second editions when significant modifications to the text are necessary. In the case of Chemistry 2e, user feedback indicated that we needed to focus on a few key areas, which we have done in the following ways:
Content revisions for clarity and accuracy. The revision plan varied by chapter based on need. About five chapters were extensively rewritten and another twelve chapters were substantially revised to improve the readability and clarity of the narrative.
Example and end-of-chapter exercises. The example and end-of-chapter exercises in several chapters were subjected to a rigorous accuracy check and revised to correct any errors, and additional exercises were added to several chapters to more fully support chapter content.
Art and illustrations. Under the guidance of the authors and expert scientific illustrators, especially those well-versed in creating accessible art, the OpenStax team made changes to much of the art in the first edition of Chemistry. The revisions included correcting errors, redesigning illustrations to improve understanding, and recoloring for overall consistency.
Accessibility improvements. As with all OpenStax books, the first edition of Chemistry was created with a focus on accessibility. We have emphasized and improved that approach in the second edition. To accommodate users of specific assistive technologies, all alternative text was reviewed and revised for comprehensiveness and clarity. Many illustrations were revised to improve the color contrast, which is important for some visually impaired students. Overall, the OpenStax platform has been continually upgraded to improve accessibility.
Pedagogical foundation and features
Throughout Chemistry 2e, you will find features that draw the students into scientific inquiry by taking selected topics a step further. Students and educators alike will appreciate discussions in these feature boxes.
- Chemistry in Everyday Life ties chemistry concepts to everyday issues and real-world applications of science that students encounter in their lives. Topics include cell phones, solar thermal energy power plants, plastics recycling, and measuring blood pressure.
 - How Sciences Interconnect feature boxes discuss chemistry in context of its interconnectedness with other scientific disciplines. Topics include neurotransmitters, greenhouse gases and climate change, and proteins and enzymes.
 - Portrait of a Chemist presents a short bio and an introduction to the work of prominent figures from history and present day so that students can see the “faces” of contributors in this field as well as science in action.
 
Comprehensive art program
Our art program is designed to enhance students’ understanding of concepts through clear, effective illustrations, diagrams, and photographs.







Interactives that engage
Chemistry 2e incorporates links to relevant interactive exercises and animations that help bring topics to life through our Link to Learning feature. Examples include:
- PhET simulations
 - IUPAC data and interactives
 - TED Talks
 
Assessments that reinforce key concepts
In-chapter Examples walk students through problems by posing a question, stepping out a solution, and then asking students to practice the skill with a “Check Your Learning” component. The book also includes assessments at the end of each chapter so students can apply what they’ve learned through practice problems.
Additional resources
Student and instructor resources
We’ve compiled additional resources for both students and instructors, including Getting Started Guides, an instructor solutions manual, and PowerPoint slides. Instructor resources require a verified instructor account, which you can apply for when you log in or create your account on OpenStax.org. Take advantage of these resources to supplement your OpenStax book.
Community Hubs
OpenStax partners with the Institute for the Study of Knowledge Management in Education (ISKME) to offer Community Hubs on OER Commons — a platform for instructors to share community-created resources that support OpenStax books, free of charge. Through our Community Hubs, instructors can upload their own materials or download resources to use in their own courses, including additional ancillaries, teaching material, multimedia, and relevant course content. We encourage instructors to join the hubs for the subjects most relevant to your teaching and research as an opportunity both to enrich your courses and to engage with other faculty.
To reach the Community Hubs, visit www.oercommons.org/hubs/OpenStax.
Technology partners
As allies in making high-quality learning materials accessible, our technology partners offer optional low-cost tools that are integrated with OpenStax books. To access the technology options for your text, visit your book page on OpenStax.org.
About the authors
Senior contributing authors
Paul Flowers, University of North Carolina at Pembroke
 Dr. Paul Flowers earned a BS in Chemistry from St. Andrews Presbyterian College in 1983 and a PhD in Analytical Chemistry from the University of Tennessee in 1988. After a one-year postdoctoral appointment at Los Alamos National Laboratory, he joined the University of North Carolina at Pembroke in the fall of 1989. Dr. Flowers teaches courses in general and analytical chemistry, and conducts experimental research involving the development of new devices and methods for microscale chemical analysis.
Klaus Theopold, University of Delaware
 Dr. Klaus Theopold (born in Berlin, Germany) received his Vordiplom from the Universität Hamburg in 1977. He then decided to pursue his graduate studies in the United States, where he received his PhD in inorganic chemistry from UC Berkeley in 1982. After a year of postdoctoral research at MIT, he joined the faculty at Cornell University. In 1990, he moved to the University of Delaware, where he is a Professor in the Department of Chemistry and Biochemistry and serves as an Associate Director of the University’s Center for Catalytic Science and Technology. Dr. Theopold regularly teaches graduate courses in inorganic and organometallic chemistry as well as general chemistry.
Richard Langley, Stephen F. Austin State University
 Dr. Richard Langley earned BS degrees in Chemistry and Mineralogy from Miami University of Ohio in the early 1970s and went on to receive his PhD in Chemistry from the University of Nebraska in 1977. After a postdoctoral fellowship at the Arizona State University Center for Solid State Studies, Dr. Langley taught in the University of Wisconsin system and participated in research at Argonne National Laboratory. Moving to Stephen F. Austin State University in 1982, Dr. Langley today serves as Professor of Chemistry. His areas of specialization are solid state chemistry, synthetic inorganic chemistry, fluorine chemistry, and chemical education.
William R. Robinson, PhD
Contributing authors
Mark Blaser, Shasta College
 Simon Bott, University of Houston
 Donald Carpenetti, Craven Community College
 Andrew Eklund, Alfred University
 Emad El-Giar, University of Louisiana at Monroe
 Don Frantz, Wilfrid Laurier University
 Paul Hooker, Westminster College
 Jennifer Look, Mercer University
 George Kaminski, Worcester Polytechnic Institute
 Carol Martinez, Central New Mexico Community College
 Troy Milliken, Jackson State University
 Vicki Moravec, Trine University
 Jason Powell, Ferrum College
 Thomas Sorensen, University of Wisconsin–Milwaukee
 Allison Soult, University of Kentucky
Reviewers
Casey Akin, College Station Independent School District
 Lara AL-Hariri, University of Massachusetts–Amherst
 Sahar Atwa, University of Louisiana at Monroe
 Todd Austell, University of North Carolina–Chapel Hill
 Bobby Bailey, University of Maryland–University College
 Robert Baker, Trinity College
 Jeffrey Bartz, Kalamazoo College
 Greg Baxley, Cuesta College
 Ashley Beasley Green, National Institute of Standards and Technology
 Patricia Bianconi, University of Massachusetts
 Lisa Blank, Lyme Central School District
 Daniel Branan, Colorado Community College System
 Dorian Canelas, Duke University
 Emmanuel Chang, York College
 Carolyn Collins, College of Southern Nevada
 Colleen Craig, University of Washington
 Yasmine Daniels, Montgomery College–Germantown
 Patricia Dockham, Grand Rapids Community College
 Erick Fuoco, Richard J. Daley College
 Andrea Geyer, University of Saint Francis
 Daniel Goebbert, University of Alabama
 John Goodwin, Coastal Carolina University
 Stephanie Gould, Austin College
 Patrick Holt, Bellarmine University
 George A. Kaminski, Worcester Polytechnic Institute
 Kevin Kolack, Queensborough Community College
 Amy Kovach, Roberts Wesleyan College
 Judit Kovacs Beagle, University of Dayton
 Krzysztof Kuczera, University of Kansas
 Marcus Lay, University of Georgia
 Pamela Lord, University of Saint Francis
 Oleg Maksimov, Excelsior College
 John Matson, Virginia Tech
 Katrina Miranda, University of Arizona
 Douglas Mulford, Emory University
 Mark Ott, Jackson College
 Adrienne Oxley, Columbia College
 Richard Pennington, Georgia Gwinnett College
 Rodney Powell, Coastal Carolina Community College
 Jeanita Pritchett, Montgomery College–Rockville 
 Aheda Saber, University of Illinois at Chicago
 Raymond Sadeghi, University of Texas at San Antonio
 Nirmala Shankar, Rutgers University
 Jonathan Smith, Temple University
 Bryan Spiegelberg, Rider University
 Ron Sternfels, Roane State Community College
 Cynthia Strong, Cornell College
 Kris Varazo, Francis Marion University
 Victor Vilchiz, Virginia State University
 Alex Waterson, Vanderbilt University
 JuchaoYan, Eastern New Mexico University
 Mustafa Yatin, Salem State University
 Kazushige Yokoyama, State University of New York at Geneseo
 Curtis Zaleski, Shippensburg University
 Wei Zhang, University of Colorado–Boulder