List for sources for chemistry homework sites from the LibOER discussion list:

Chemwiki - now Chem LibreTexts
Chem LibreTexts, formerly known as Chemwiki.
Under the Core link is a special section for environmental chemistry.Various exercises are listed here:

Florida Atlantic University

U of Oklahoma: Practice Problems in Biomedical Organic Chemistry: Self Guided Problems and Answers for Students in Bioorganic and Organic Chemistry, Volume 1.

Chemistry Tutorials & Drills

CSU Chemistry Drills for use with "Chemistry and Chemical Reactivity" by Kotz and Treichel

University of Missouri-Rolla Chemistry Tutorial Self-Tests

Gen Chem Electronic Study Aides

Ohio State University Chem Quizzes & Tutorials

Bottomless Worksheet of Mole Conversions

PhET Interactie Simulations, University of Colorado, Boulder

The Concord Consortium, Chemistry

The Virtual Microscope, University of Delaware
(no equations)

(no equations)

Chemistry Textbooks:

OpenStax has two chemistry textbooks (Chemistry and Chemistry: Atoms First) that come with lots of free ancillary resources for instructors (syllabus, PowerPoint slides, Instructor Solutions Manual, etc.) and are available in different formats.

The Open Textbook Library has several additional chemistry textbooks in its Natural & Physical Sciences category (General Chemistry: Principles, Patterns, and Applications, Introductory Chemistry,The Basics of General, Organic, and Biological Chemistry,

Organic Chemistry Laboratory Techniques). Also in the Open Textbook Library, Sustainability: A Comprehensive Foundation has chapters on global warming, water & pollution, and the biosphere.

Jen Waller from the University of Oklahoma recently shared a link to Practice Problems in Biomedical Organic Chemistry: Self Guided Problems and Answers for Students in Bioorganic and Organic Chemistry, Volume 1. The University of Oklahoma also has a great LibGuide page devoted to chemistry OER.

-- LibOER Discussion list
Virtual Chemistry LabHighly reviewed by MERLOT peers - "Here's your chance to mix chemicals without wearing safety goggles. You won't spill any acid on the spectrometer in this lab. Choose solutions from the vast database and mix 'em together till the cloned cows come home. Marvel as the chemical solutions react in real time. "

Ideal Gas Law SimulationsUsed in courses across the CSU - "An effective tool to help students learn about all aspects of the ideal gas law. One of the best web gas law simulations."

Interactive Simulations for General ChemistryThe collection of interactive simulations covers a wide range of general chemistry topics, with each simulation addressing key concepts and enable students to practice and teachers to demonstrate these topics.

ChemWiki Textbook MapsChemWiki is maintained by UC Davis and is a collaborative approach to chemistry education. Its Textbook Maps matches ChemWiki's openly available material to the contents of popular textbooks. Physical, theoretical, organic, inorganic, analytical, and general chemistry textbooks are included.

ChemCollective -Carnegie Mellon The ChemCollective is a collection of virtual labs, scenario-based learning activities, tutorials, and concept tests. Teachers can use our content for pre-labs, for alternatives to textbook homework, and for in-class activities for individuals or teams. Students can review and learn chemistry concepts using our virtual labs, simulations, and tutorials. The ChemCollective is organized by a group of faculty and staff at Carnegie Mellon who are interested in using, assessing, and creating engaging online activities for chemistry education. Project Director: Prof. David Yaron, Carnegie Mellon University, Chemistry The ChemCollective site and its contents are licensed under a Creative Commons Attribution-NonCommercial-NoDerivitaves 3.0 License.