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Precipitation Reactions Two versions of the Orange Tornado, two reactions under a microscope, and updated stills of other precipitation reactions provide dramatic visual displays of solid formation.
Equilibrium : KspSaturation (12 Variations)
Zn(OH)2 has a Ksp of 4.5 x 10-17. If you have a solution of Zn(OH)2 that has a hydroxide ion concentration equal to 4.6 x 10-6 mol/L, the solution is ... (Assume that the only relevant reaction is the solubility-product equilibrium.)
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
Designing and Conducting a Purification Scheme as an Organic Chemistry Laboratory PracticalKate J. Graham, Brian J. Johnson, T. Nicholas Jones, Edward J. McIntee, and Chris P. Schaller Describes an open-ended laboratory practical that challenges students to evaluate when different purification techniques are appropriate. Graham, Kate J.; Johnson, Brian J.; Jones, T. Nicholas; McIntee, Edward J.; Schaller, Chris P. J. Chem. Educ.2008, 85, 1644.
IR Spectroscopy |
Microscale Lab |
Molecular Properties / Structure |
NMR Spectroscopy |
Physical Properties |
Separation Science
Revising the ACS Guidelines for Chemistry Programs in Two-Year Colleges: Exploring Changes and OpportunitiesJohn V. Clevenger, Margaret S. Richards, and Jodi L. Wesemann A draft of the next edition of the ACS Guidelines for Chemistry Programs in Two-Year Colleges contains guidelines designed to maximize the potential of students, faculty, and programs in two-year colleges; reflect changes in pedagogy, technology, and accountability; facilitate student transfer; and provide a more useful resource for strengthening programs. Clevenger, John V.; Richards, Margaret S.; Wesemann, Jodi L. J. Chem. Educ.2008, 85, 1602.
