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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.
Prussian Blue: Artists' Pigment and Chemists' SpongeMike Ware The variable composition of Prussian blue tantalized chemists until investigations by X-ray crystallography in the late 20th century explained its many properties and uses. Ware, Mike. J. Chem. Educ.2008, 85, 612.
Applications of Chemistry |
Coordination Compounds |
Dyes / Pigments |
Electrochemistry |
Oxidation / Reduction |
Photochemistry |
Toxicology
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
Procedure for Decomposing a Redox Reaction into Half-ReactionsIlie Fishtik and Ladislav H. Berka The principle of stoichiometric uniqueness provides a simple algorithm to check whether a simple redox reaction may be uniquely decomposed into half-reactions in a single way. For complex redox reactions the approach permits a complete enumeration of a finite and unique number of ways a redox reaction may be decomposed into half-reactions. Several examples are given. Fishtik, Ilie; Berka, Ladislav H. J. Chem. Educ.2005, 82, 553.
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.
3FeSO3 
Go for the oxidation of 2 mole of silver in the following balanced reaction. 
