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Determining Oxidation-Reduction on a Simple Number Line

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Amy L. Cox

Paducah Tilghman High School, Paducah, KY 42001

James R. Cox

Department of Chemistry, Murray State University, Murray, KY 42071-3346

J. Chem. Educ., 2002, 79 (8), p 965

DOI: 10.1021/ed079p965

Publication Date (Web): August 1, 2002

Abstract

Oxidation–reduction is an important concept taught throughout the chemistry curriculum. We have implemented a method that encourages students to use a simple number line to analyze oxidation–reduction reactions. This approach has been termed the ROLR (Right-Oxidation-Left-Reduction) method and has been used effectively in introductory/general chemistry, organic chemistry, and biochemistry. When analyzing chemical reactions, students place species (reactants and products) on a number line according to their oxidation number. A movement to the right indicates an oxidative process (loss of electrons), and a movement to the left indicates a reductive process (gain of electrons). While oxidation–reduction reactions encountered across the chemistry curriculum can be diverse, the use of a number line gives students a consistent approach to analyzing these types of reactions.

Keywords (Audience):

First-Year Undergraduate / General

Keywords (Domain):

Biochemistry

Keywords (Pedagogy):

Analogies / Transfer

Keywords (Subject):

Oxidation / Reduction

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This article has been cited by 1 ACS Journal articles (1 most recent appear below).

Oxidation Numbers, Oxidants, and Redox Reactions: Variants of the Electrophilic Bromination of Alkenes and Variants of the Application of Oxone
Marco Eissen, Merle Strudthoff, Solveig Backhaus, Carolin Eismann, and Gesa Oetken, Sören Kaling, Dieter Lenoir
Journal of Chemical Education2011 88 (3), 284-291
- Oxidation Numbers, Oxidants, and Redox Reactions: Variants of the Electrophilic Bromination of Alkenes and Variants of the Application of Oxone
  Marco Eissen, Merle Strudthoff, Solveig Backhaus, Carolin Eismann, and Gesa Oetken, Sören Kaling, Dieter Lenoir
  Journal of Chemical Education2011 88 (3), 284-291
  Oxidation-state and donor−acceptor concepts are important areas in the chemical education. Student worksheets containing problems that emphasize oxidation numbers, redox reactions of organic compounds, and stoichiometric reaction equations are presented. ...
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