Amazon.com description: Product Description: Teaches chemistry to health care professionals and students. Covers chemical principles, atomic and molecular structure, and organic substances, particularly acids, bases, salts, buffers, and redox reactions and their associated equilibria--encouraging students to see these not as isolated subjects, but as substances that profoundly affect their own health. In this Fourth Edition, the chapters on general chemistry are significantly changed. There is now a unit on the Henderson-Hasselbalch equation and more on how to write Lewis structures; a new, concise chapter on redox reactions; and highlighted material on multiple bonds and hybrid orbitals. The section on organic chemistry remains essentially the same and continues to introduce the functional groups in a sound, pedagogical way. Tying it all together are the biochemistry chapters, which relate everything covered to its study of the principal organic substances of cells--carbohydrates, lipids, protein and nucleic acids. Updates to this edition include new ``Special Topics:'' the greenhouse effect and ozone in smog and in the stratosphere.