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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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Fortman, John J.; Battino, Rubin – Journal of Chemical Education, 1990
Described are demonstrations provided for secondary school students designed to illustrate the fun and wonder of chemistry and learning by experimentation. A list of the contents for the videotapes and suggestions for discussions using the videotapes are provided. (CW)
Descriptors: Audiovisual Aids, Chemical Reactions, Chemistry, Demonstrations (Educational)
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Gilbert, George L., Ed. – Journal of Chemical Education, 1990
Presented are two demonstrations; "Heat of Solution and Colligative Properties: An Illustration of Enthalpy and Entropy," and "A Vapor Pressure Demonstration." Included are lists of materials and experimental procedures. Apparatus needed are illustrated. (CW)
Descriptors: Chemistry, College Science, Demonstrations (Educational), Higher Education
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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
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Brown, Trevor M.; And Others – Journal of Chemical Education, 1990
Described is an experiment which may be carried out quickly using tungsten-filament irradiation. Materials, experimental procedures, and results are discussed. Procedures for filtration on silica gel are appended. (CW)
Descriptors: Chemical Reactions, Chemistry, College Science, Higher Education
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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
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Davis, Alan; Speer, Henry L. – Journal of Chemical Education, 1990
Presented is the course outline and proposed science content for this course. The structure, sessions, and evaluation of the course are discussed. (CW)
Descriptors: Chemistry, College Science, Course Content, Course Descriptions
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Gilbert, George L., Ed. – Journal of Chemical Education, 1990
Described are demonstrations designed to reveal the important "nonsolvent" properties of water through its interaction with a toy called "Magic Sand" and other synthetic silica derivatives, especially those bonded with organic moities. The procedures for seven demonstrations along with a discussion of the effects are presented. (CW)
Descriptors: Chemical Reactions, Chemistry, College Science, Higher Education
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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
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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
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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
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Fate, Gwendolyn; Lynn, David G. – Journal of Chemical Education, 1990
Presented are laboratory methods which allow the demonstration and determination of the diffusion coefficients of compounds ranging in size from water to small proteins. Included are the procedures involving the use of a spectrometer, UV cell, triterated agar, and oxygen diffusion. Results including quantification are described. (CW)
Descriptors: Chemical Reactions, Chemistry, College Science, Diffusion (Physics)
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