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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.
Synthesis of Methyl Diantilis, a Commercially Important FragranceWilliam H. Miles and Katelyn B. Connell Describes the synthesis of a family of fragrances, including the commercially important Methyl Diantilis, and provides an excellent introduction to intellectual property laws. Miles, William H.; Connell, Katelyn B. J. Chem. Educ.2006, 83, 285.
A Microwave-Assisted Reduction of Cyclohexanone Using Solid-State-Supported Sodium BorohydrideLori L. White and Kevin W. Kittredge We report a microwave-assisted reduction of cyclohexanone by sodium borohydride that is supported on SiO2. The reaction was completed in less than 3 minutes. Workup and analysis by GCMS, IR, and 1H NMR was possible in a two and half-hour laboratory session. This reduction was used successfully in a second-year organic chemistry laboratory. Students were exposed to a green chemistry reaction using solid-state-supported reactants in the absence of solvent. White, Lori L.; Kittredge, Kevin W. J. Chem. Educ.2005, 82, 1055.
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.
