ERIC Number: EJ1030298
Record Type: Journal
Publication Date: 2014-Jan
Abstractor: As Provided
Reference Count: N/A
Charting an Alternate Pathway to Reaction Orders and Rate Laws in Introductory Chemistry Courses
Rushton, Gregory T.; Criswell, Brett A.; McAllister, Nicole D.; Polizzi, Samuel J.; Moore, Lamesha A.; Pierre, Michelle S.
Journal of Chemical Education, v91 n1 p66-73 Jan 2014
Reaction kinetics is an axiomatic topic in chemistry that is often addressed as early as the high school course and serves as the foundation for more sophisticated conversations in college-level organic, physical, and biological chemistry courses. Despite the fundamental nature of reaction kinetics, students can struggle with transforming their corpuscular reaction concepts into mathematical rate models. Here, we describe an approach to teaching rate laws at the introductory college level that draws upon model-based reasoning as the pedagogical underpinning. Collision theory, graphical analysis of kinetics plots, and transformations between concentration/time and rate/concentration representations are used to facilitate the growth in understanding about rate laws and reaction mechanisms. The learning outcome expected by the conclusion of the instructional sequence is the ability to collect and analyze kinetic data to determine reaction orders and rate laws using mathematical concepts familiar to students just beginning a course sequence in calculus. While the ideas that are discussed in this paper focus on kinetics principles as they might be presented in undergraduate general chemistry courses, we believe they would also prove useful at the advanced high school level.
Descriptors: Science Instruction, Chemistry, College Science, Kinetics, Scientific Concepts, Teaching Methods, Introductory Courses, Data Collection, Data Analysis, Secondary School Science, High Schools
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: firstname.lastname@example.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; Postsecondary Education; High Schools
Authoring Institution: N/A