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Crystallization of Supersaturated Sodium Acetate A supersaturated solution of sodium acetate is poured onto one small sodium acetate crystal. Crystals form from the liquid immediately upon contact with the seed crystal. A thermometer shows that the crystallization process is exothermic. A chemical hot pack is shown as an example of a commercially available supersaturated solution.
The Fuge Tube Diode Array SpectrophotometerB. T. Arneson, S. R. Long, K. K. Stewart, and J. J. Lagowski Presents details for adapting a diode array UVvis spectrophotometer to incorporate the use of polypropylene microcentrifuge tubesfuge tubesas cuvettes. The fuge tubes also can serve as reaction vessels, which permits the ready study of chemical systems involving heterogeneous phases by eliminating the need for tedious separations. Arneson, B. T.; Long, S. R.; Stewart, K. K.; Lagowski, J. J. J. Chem. Educ.2008, 85, 1663.
Laboratory Equipment / Apparatus |
Solutions / Solvents |
Spectroscopy |
UV-Vis Spectroscopy
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
Manual Data Processing in Analytical Chemistry: Linear CalibrationDora Melucci Most science students are familiar with Excel spreadsheets, but determining which of Excels statistical functions perform a calculation equivalent to a classical equation and calculating errors with Excel are not trivial exercises. Melucci, Dora. J. Chem. Educ.2008, 85, 1346.
SolutionsEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Solutions / Solvents
Measuring the Composition of a SolutionEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Solutions / Solvents
Ideal Solutions: Raoult's LawEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
