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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.
The Baeyer–Villiger Oxidation with Trifluoroacetic Acid and Household Sodium PercarbonateRichard A. Kjonaas and Anthony E. Clemons Reports a method for carrying out the BaeyerVilliger oxidation of cyclopentanone to d-valerolactone in a large-section introductory organic chemistry laboratory course. Kjonaas, Richard A.; Clemons, Anthony E. J. Chem. Educ.2008, 85, 827.
Aldehydes / Ketones |
Esters |
NMR Spectroscopy |
Oxidation / Reduction |
Synthesis
Using Ozone in Organic Chemistry Lab: The Ozonolysis of EugenolBruce M. Branan, Joshua T. Butcher, and Lawrence R. Olsen This organic laboratory involves the ozonolysis of eugenol (clove oil) followed by a reductive workup that generates an aldehyde easily identified by its NMR and IR spectra. Branan, Bruce M.; Butcher, Joshua T.; Olsen, Lawrence R. J. Chem. Educ.2007, 84, 1979.
Aldehydes / Ketones |
Gases |
IR Spectroscopy |
Laboratory Equipment / Apparatus |
Natural Products |
NMR Spectroscopy |
Synthesis |
Oxidation / Reduction
A Guided-Inquiry Approach to the Sodium Borohydride Reduction and Grignard Reaction of Carbonyl CompoundsRobert E. Rosenberg Students teams identify unknowns and their reaction products and use their data to deduce that esters are less electrophilic than the other carbonyl compounds present, that Grignard reagents are more nucleophilic than sodium borohydride, and that carboxylic acid derivatives do not undergo the nucleophilic addition reactions that are characteristic of aldehydes and ketones. Rosenberg, Robert E. J. Chem. Educ.2007, 84, 1474.
