18.4. Balancing Oxidation-Reduction Reactions by the Half-Reaction Method
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Exploding Soap Bubbles: Hydrogen + Oxygen A series of three videos shows that as the ratio of oxygen to hydrogen in soap bubbles increases, the explosions that occur when the bubbles are ignited get louder. (The fact that with an excess of oxygen the explosions would become softer again is not shown.) Each video is repeated with no voice-over so that only the sounds of the explosions are heard. Five still images are provided to show the stoichiometry on the molecular scale. The videos are intended to be shown in order beginning with Hydrogen Alone and ending with hydrogen plus more oxygen.
Consider a cell composed of the following half-reactions. Determine the
magnitude of E° for the cell and decide whether the reaction will be
product-favored or reactant-favored as written.
The Role of Water Chemistry in Marine Aquarium Design: A Model System for a General Chemistry ClassJeffrey J. Keaffaber, Ramiro Palma, and Kathryn R. Williams Water chemistry is central to aquarium design, and it provides many potential applications for discussion in undergraduate chemistry and engineering courses. This article uses a hypothetical tank to house ocean sunfish as a model to show students the calculations and other considerations that are needed when designing a marine aquarium. Keaffaber, Jeffrey J.; Palma, Ramiro; Williams, Kathryn R. J. Chem. Educ.2008, 85, 225.
Acids / Bases |
Aqueous Solution Chemistry |
Consumer Chemistry |
Oxidation / Reduction |
Stoichiometry |
Water / Water Chemistry
Effectiveness of Conceptual Change-Oriented Teaching Strategy To Improve Students' Understanding of Galvanic CellsAli Riza Özkaya, Musa Üce, Hakan Sariçayir, and Musa Sahin This article presents efforts to develop a conceptual change-oriented strategy to teaching galvanic cells in electrochemistry. The objective is to assess the effectiveness of conceptual change-oriented instruction relative to conventional instruction using statistical comparisons. Özkaya, Ali Riza; Üce, Musa; Sariçayir, Hakan; Sahin, Musa. J. Chem. Educ.2006, 83, 1719.
Electrochemistry |
Equilibrium |
Oxidation / Reduction |
Undergraduate Research
Conceptual Considerations in Molecular ScienceDonald T. Sawyer The undergraduate curriculum and associated textbooks include several significant misconceptions. Sawyer, Donald T. J. Chem. Educ.2005, 82, 985.
Chromate-Dichromate (GCMP)David M. Whisnant Chromate/Dichromate: this is a resource in the collection "General Chemistry Multimedia Problems". In this problem we will study shifts in the equilibrium between chromate and dichromate. General Chemistry Multimedia Problems ask students questions about experiments they see presented using videos and images. The questions asked apply concepts from different parts of an introductory course, encouraging students to decompartmentalize the material.
Oxidation / Reduction
Halogens and Halides (GCMP)David M. Whisnant Halogens and Halides: this is a resource in the collection "General Chemistry Multimedia Problems". In this problem we will study the oxidation-reduction reactions between the halogens and the halide ions. The halogens and halides will be dissolved in water and hexane. General Chemistry Multimedia Problems ask students questions about experiments they see presented using videos and images. The questions asked apply concepts from different parts of an introductory course, encouraging students to decompartmentalize the material.
Oxidation / Reduction
Redox ReactionsEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
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