Zumdahl and DeCoste's best-selling INTRODUCTORY CHEMISTRY: A FOUNDATION, Ninth Edition, combines enhanced problem-solving structure with substantial pedagogy to enable students to become strong, independent problem solvers. Capturing student interest through early coverage of chemical reactions, accessible explanations and visualizations, and an emphasis on everyday applications, the authors explain chemical concepts starting with the basics and conclude by encouraging students to test their own understanding of the solution. ?Critical Thinking? questions useful for generating class discussion emphasize the importance of conceptual learning.