ERIC Number: EJ1486845
Record Type: Journal
Publication Date: 2025-Oct
Pages: 8
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
EISSN: EISSN-1938-1328
Available Date: 0000-00-00
Description of a Systematic Model for the Construction and Interpretation of Logarithmic Diagrams Applied to Redox Equilibria
Journal of Chemical Education, v102 n10 p4314-4321 2025
This article focuses on describing a systematic model for constructing, describing, and interpreting logarithmic diagrams as a graphical method for representing redox chemical equilibria. This model considers concepts such as electron potential (p[subscript e]), the chemical equilibrium constant (K[subscript d]), and the standard reduction potential (E[superscript 0]). The term "p[subscript e]" is mathematically defined as p[subscript e] = log [e-bar], where [e-bar] represents the activity of electrons in a redox system. Mathematical logarithmic expressions are proposed to graph the behavior of the species involved in the chemical equilibrium with regard to p[subscript e]. These logarithmic diagrams enable the analysis of redox equilibria in terms of reactivity, stability, and predominance of a species and its redox pair. The proposed model can be integrated into Inorganic and Analytical Chemistry courses, as it involves a range of mathematical concepts and elements, including diagrams, exponential and logarithmic equations, and polynomials. These components are closely associated with topics such as redox equilibrium, chemical equation balancing, the redox behavior of a chemical species, and material balances. Collectively, they represent both conceptual and procedural frameworks that support the development of scientific competencies.
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: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A
Author Affiliations: 1Department of Chemistry, Universidad Pedagógica Nacional, Bogotá 110221, Colombia

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