10.2. Oxidizing Agents: They Bleach and They Disinfect
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Molecular Models of Peroxides and AlbendazolesWilliam F. Coleman This month's Featured Molecules are albendazole and benzoyl peroxide. Coleman, William F. J. Chem. Educ.2008, 85, 1710.
Consumer Chemistry |
Molecular Properties / Structure |
Molecular Modeling
Investigating the Stability of Benzoyl Peroxide in Over-the-Counter Acne MedicationsMarina Canepa Kittredge, Kevin W. Kittredge, Melissa S. Sokol, Arlyne M. Sarquis, and Laura M. Sennet Students use peroxide strips to investigate the stability of the benzoyl peroxide found in an over-the-counter acne medication when added to various solutions of water, ethanol, polyethylene glycol, and isopropyl myristate. Canepa Kittredge, Marina; Kittredge, Kevin W.; Sokol, Melissa S.; Sarquis, Arlyne M.; Sennet, Laura M. J. Chem. Educ.2008, 85, 1655.
Consumer Chemistry |
Drugs / Pharmaceuticals |
Nonmajor Courses |
Solutions / Solvents
ResorcinolJay A. Young Safe handling of resorcinol in the laboratory is discussed. Young, Jay A. J. Chem. Educ.2008, 85, 1618.
SunscreensWilliam F. Coleman Reinforcing the "Heath and Wellness" theme of National Chemistry Week 2004, the featured molecules for this month are all found in commercial sunscreens, or in the synthesis of sunscreen materials. The paper by Stabile and Dicks introduces students of organic chemistry to the synthesis of cinnamate esters used in sunscreen products. Several of the papers referenced by those authors, most notably a paper by Doris Kimbrough (J. Chem. Educ. 1997, 74, 51?53), present the structures of additional sunscreen components. Although the details of the synthesis are beyond the scope of most introductory courses, these molecules present an excellent opportunity for introducing students to the absorption of radiation that is far more relevant to their lives than the line spectra of hydrogen and other atoms. Such a discussion could be extended to include more delocalized dyes such as those frequently studied in physical chemistry courses as a test of particle-in-a-box models, and students could be asked about those molecules as sunscreens, which raises an interesting intersection between aesthetics and spectroscopy.
Consumer Chemistry
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.
Go for the oxidation of 2 mole of silver in the following balanced reaction. 
Ca(s) + 2AgI(s) 
