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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.
Mercury Beating Heart: Modifications to the Classical DemonstrationMetodija Najdoski, Valentin Mirceski, Vladimir M. Petruševski, and Sani Demiri The classic mercury beating heart demonstration is modified with various electrolytes. Najdoski, Metodija; Mirceski, Valentin; Petruševski, Vladimir M.; Demiri, Sani. J. Chem. Educ.2007, 84, 1292.
Electrochemistry |
Oxidation / Reduction |
Surface Science
A Modified Demonstration of the Catalytic Decomposition of Hydrogen PeroxideCarlos Alexander Trujillo A safer and cheaper version of the popular catalyzed decomposition of hydrogen peroxide demonstration commonly called the Elephants Toothpaste is presented. Hydrogen peroxide is decomposed in the presence of a surfactant by the enzyme catalase producing foam. Catalase has a higher activity compared with the traditional iodide and permits the use of diluted hydrogen peroxide solutions. The demonstration can be made with household products with similar amazing effects. Trujillo, Carlos Alexander. J. Chem. Educ.2005, 82, 855.
Catalysis |
Kinetics |
Oxidation / Reduction
CLIP: Acetic AnhydrideJay A. Young Boric acid is a mild oxidizing agent. Young, Jay A. J. Chem. Educ.2002, 79, 1202.
Common Oxidizing AgentsEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Oxidation / Reduction
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.
3FeSO3 
Go for the oxidation of 2 mole of silver in the following balanced reaction. 
