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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.
[#95] A Candle in the WindRobert J. Eierman Students follow in the footsteps of Michael Faraday and investigate the factors that enable a candle to burn. Eierman, Robert J. J. Chem. Educ.2008, 85, 528A.
Oxidation / Reduction |
Reactions
Synthesis of Albendazole Metabolite: Characterization and HPLC DeterminationGraciela Mahler, Danilo Davyt, Sandra Gordon, Marcelo Incerti, Ivana Núñez, Horacio Pezaroglo, Laura Scarone, Gloria Serra, Mauricio Silvera, and Eduardo Manta In this laboratory activity, students are introduced to the synthesis of an albendazole metabolite obtained by a sulfide oxidation reaction. Albendazole as well as its metabolite, albendazole sulfoxide, are used as anthelmintic drugs. The oxidation reagent is H2O2 in acetic acid. The reaction is environmental friendly, fast, and proceeds with high yield. The crude reaction is analyzed by HPLC chromatography to determine purity. The simplicity of the experiment allows students to study chiral concepts, physicochemical and spectroscopic properties of the compounds, and HPLC determinations. Mahler, Graciela; Davyt, Danilo; Gordon, Sandra; Incerti, Marcelo; Núñez, Ivana; Pezaroglo, Horacio; Scarone, Laura; Serra, Gloria; Silvera, Mauricio; Manta, Eduardo. J. Chem. Educ.2008, 85, 1652.
Chirality / Optical Activity |
Drugs / Pharmaceuticals |
HPLC |
Medicinal Chemistry |
Organosulfur Compounds |
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Synthesis
The Synthesis of a Cockroach PheromonePatty L. Feist This paper describes the synthesis of gentisyl quinone isovalerate or blattellaquinone, a sex pheromone of the German cockroach and a compound with real-world applications. The experiment also affords students practice in extraction as well as IR and NMR spectroscopy. Feist, Patty L. J. Chem. Educ.2008, 85, 1548.
Oxygen the 21% Solution In this hands-on activity, which is part of the ACS-Science for Kids collection, students explore chemical reactions by observing the reaction of steel wool with oxygen in the air. As the oxygen in the container is consumed, water enters and students can estimate the amount of oxygen in the supply of air.
Reactions |
Oxidation / Reduction
Rust ? The Crust That Makes Stuff Bust In this hands-on activity, which is part of the ACS-Science for Kids collection, students explore chemical reactions by observing the reaction of steel wool as it rusts in the presence of oxygen in the air. Students determine that air is essential for rusting to occur.
Reactions |
Oxidation / Reduction
What?s That Stuff?: Teeth Whiteners This article on the chemistry of tooth whiteners is part of a collection of articles from Chemical&Engineering News (C&EN) that present the chemistry behind a wide variety of everyday products.
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.
Go for the oxidation of 2 mole of silver in the following balanced reaction. 
Ca(s) + 2AgI(s) 
