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For the textbook, chapter, and section you specified we found
Centrifuging a SampleJohn W. Moore, Jerrold J. Jacobsen, Lois M. Browne, John F. Zimmerman The demonstration on this page shows a technique that should not be used by undergraduate chemistry laboratory. This video shows what happens to sample in a centrifuge while the centrifuge is on, and the result of stopping the centrifuge improperly. A narrative is included in this video: The centrifuging process allows the solvent to completely settle out. The jarring caused by hand braking destroys the distinct separation between supernatant and solid.
Separation Science |
Laboratory Equipment / Apparatus
Centrifuge Centrifuging safety considerations, centrifuging a sample, loading and unloading a centrifuge, removing the supernatant, and washing the precipitate are discussed and demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
Distillation Here we consider distillation including simple distillation, distillation at reduced pressure and using a rotary evaporator.
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
Study of Molecular-Shape Selectivity of Zeolites by Gas ChromatographyPei-Yu Chao, Yao-Yuan Chuang, Grace Hsiuying Ho, Shiow-Huey Chuang, Tseng-Chang Tsai, Chi-Young Lee, Shang-Tien Tsai, and Jun-Fu Huang This analytical or physical chemistry sorption experiment uses hexane isomers as probe molecules to demonstrate the "molecular-shape selectivity" behavior of zeolites. Students can also modify the sorption protocol to build their own experiments. Chao, Pei-Yu; Chuang, Yao-Yuan; Ho, Grace Hsiuying; Chuang, Shiow-Huey; Tsai, Tseng-Chang; Lee, Chi-Young; Tsai, Shang-Tien; Huang, Jun-Fu. J. Chem. Educ.2008, 85, 1558.
Alkanes / Cycloalkanes |
Constitutional Isomers |
Gas Chromatography |
Molecular Properties / Structure |
Physical Properties |
Separation Science |
Solid State Chemistry |
Molecular Recognition
Greener Alternative to Qualitative Analysis for Cations without H2S and Other Sulfur-Containing CompoundsIndu Tucker Sidhwani and Sushmita Chowdhury The classic technique for the qualitative analysis of inorganic salts and mixtures relies on highly toxic hydrogen sulfide. Increasing environmental awareness has prompted the development of a green scheme for the detection of cations by spot tests that is simple and fast. Sidhwani, Indu Tucker; Chowdhury, Sushmita. J. Chem. Educ.2008, 85, 1099.
