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Feliu, Anthony L. – Journal of Chemical Education, 1990
Discussed are the properties, chemistry, generation of precursors, and use in organic synthesis of this isotope of carbon. The use of carbon-11 in research is emphasized. Pitfalls and possibilities are described. (CW)
Descriptors: Chemical Analysis, Chemical Reactions, Chemistry, College Science
Peer reviewed Peer reviewed
Logan, S. R. – Journal of Chemical Education, 1990
Discussed are the kinetic interactions of these chemical processes and the determination of the actual order of such reactions. Included are multiple exchange, catalytic exchange with deuterium, and depletion of the original substrate. (CW)
Descriptors: Chemical Analysis, Chemical Reactions, Chemistry, College Science
Peer reviewed Peer reviewed
MacDonald, J. J. – Journal of Chemical Education, 1990
Suggestions for the use of two different conventions in difference and rate terms in thermodynamics are made. It is shown how this approach lends itself to an accurate and concise discussion of function changes for a chemical reaction. (CW)
Descriptors: Chemical Analysis, Chemical Equilibrium, Chemical Reactions, Chemistry
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Campbell, Mark L.; Waite, Boyd A. – Journal of Chemical Education, 1990
Provided is a rebuttal to an argument concerning the use of Ka values for water and the hydronium ion. The derivation of new values as a result of the treatment of the water as the solvent and using a Raoult's Law standard state is discussed. (CW)
Descriptors: Acids, Chemical Analysis, Chemical Equilibrium, Chemical Reactions
Peer reviewed Peer reviewed
Mealli, Carlo; Proserpio, Davide M. – Journal of Chemical Education, 1990
A collection of Molecular Orbital (MO) programs that have been integrated into routines and programs to illustrate MO theory are presented. Included are discussions of Computer Aided Composition of Atomic Orbitals (CACAO) and Walsh diagrams. (CW)
Descriptors: Chemical Analysis, Chemistry, College Science, Computer Assisted Instruction
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Ma, Yinfa; Yeung, Edward S. – Journal of Chemical Education, 1990
Described is a simple and interesting chromatography experiment using three different fluorescence detection principles for the determination of caffeine, saccharin and sodium benzoate in beverages. Experimental procedures and an analysis and discussion of the results are included. (CW)
Descriptors: Chemical Analysis, Chemical Reactions, Chemistry, Chromatography
Peer reviewed Peer reviewed
Mabbott, Gary A. – Journal of Chemical Education, 1990
Experiments designed to help undergraduate students gain experience operating instruments and interpreting gas chromatography and mass spectrometry data are presented. Experimental reagents, procedures, analysis, and probable results are discussed. (CW)
Descriptors: Biochemistry, Chemical Analysis, Chemical Reactions, College Science
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Ewing, Galen W. – Journal of Chemical Education, 1990
Safety issues specifically related to the analytical laboratory are discussed including hazardous reagents, transferring samples, cleaning apparatus, eye protection, and equipment damage. Special attention is given to techniques which not only endanger the technician but also endanger expensive equipment. (CW)
Descriptors: Accident Prevention, Chemical Analysis, Chemistry, College Science
Peer reviewed Peer reviewed
Griswold, John R.; Rauner, Richard A. – Journal of Chemical Education, 1990
Presented are the procedures and a discussion of the results for an experiment in which students select unknown carboxylic acids, determine their melting points, and investigate their solubility behavior in water and ethanol. A table of selected carboxylic acids is included. (CW)
Descriptors: Acids, Chemical Analysis, Chemistry, College Freshmen
Peer reviewed Peer reviewed
Champion, Timothy D.; Schwenz, Richard W. – Journal of Chemical Education, 1990
Background information, laboratory procedures, and a discussion of the results of an experiment designed to investigate the difference in energy gained from the aerobic and anaerobic oxidation of glucose are presented. Sample experimental and calculated data are included. (CW)
Descriptors: Calorimeters, Chemical Analysis, Chemical Reactions, Chemistry
Peer reviewed Peer reviewed
Williams, Kathryn R.; And Others – Journal of Chemical Education, 1990
Discussed are the procedures and results involved in this activity. Student results in undergraduate laboratories indicate high quality results and relative ease of the analysis. (CW)
Descriptors: Chemical Analysis, Chemical Reactions, Chemistry, College Science
Peer reviewed Peer reviewed
Smith, Sherrel – Journal of Chemical Education, 1990
Detailed is a method in which short pieces of teflon tubing may be used for collection tubes for collecting preparative fractions from gas chromatographs. Material preparation, laboratory procedures, and results of this method are discussed. (CW)
Descriptors: Chemical Analysis, Chemistry, Chromatography, College Science
Peer reviewed Peer reviewed
Stapanian, Martin A.; Metcalf, Richard C. – Journal of Chemical Education, 1990
Described is the derivation of the relationship between the pH measurement error and the resulting percentage error in hydrogen ion concentration including the use of variable activity coefficients. The relative influence of the ionic strength of the solution on the percentage error is shown. (CW)
Descriptors: Chemical Analysis, Chemistry, College Science, Error of Measurement
Peer reviewed Peer reviewed
Williams, Kathryn R.; King, Roy W. – Journal of Chemical Education, 1990
Described are six multipulse experiments with an emphasis on their application to common problems in chemistry. Exercises in relaxation time measurement, spin echoes, and polarization transfer are proposed. (CW)
Descriptors: Chemical Analysis, Chemistry, College Science, Higher Education
Peer reviewed Peer reviewed
Fujita, Shinsaku – Journal of Chemical Education, 1990
Discussed are the substructures (subgraphs) of imaginary transition structures that provide an effective approach to the characterization of organic reactions. A comparison of conventional methods and this method is presented. (CW)
Descriptors: Chemical Analysis, Chemical Reactions, Chemistry, Classification
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