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Smith, Derek W. – Journal of Chemical Education, 1990
Presented is a modification of Bratsch's prescription so that difficult problems are obviated while simple, familiar Pauling electronegativities are retained. Discussed are the equilibration of electronegativity in molecules, group electronegativities, coordination compounds and molecules with dative bonds, ions, and correlation with core…
Descriptors: Atomic Structure, Chemical Bonding, Chemical Equilibrium, Chemical Reactions
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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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Carriedo, Gabino A. – Journal of Chemical Education, 1990
Discussed is an extension of the conventional method for studying the organometallic chemistry of transition metals that may be useful to show how the various existing types of low-valence complexes can be constructed. This method allows students to design new types of complexes that may still be nonexistent. (CW)
Descriptors: Chemical Analysis, Chemical Reactions, Chemistry, Classification
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Slade, Peter W.; Rayner-Canham, Geoffrey W. – Journal of Chemical Education, 1990
Described are some of the difficulties presented in these reactions by competing equilibria that are usually ignored. Situations involving acid-base equilibria, solubility product calculations, the use of ammonia as a complexing agent, and semiquantitative comparisons of solubility product values are discussed. (CW)
Descriptors: Chemical Analysis, Chemical Reactions, Chemistry, College Science
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Russo, Steven O.; Hanania, George I. H. – Journal of Chemical Education, 1990
Described is an experiment which is designed to investigate the reaction of the protein ferrimyoglobin with fluoride. The activity uses readily available apparatus and the technique of optical absorbance for measurement of concentrations. Experimental design, procedures, and treatment of the equilibrium data are detailed. (CW)
Descriptors: Biochemistry, Chemical Analysis, Chemical Reactions, Chemistry
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Bernauer, Robert; Daly, John M. – Journal of Chemical Education, 1990
The materials needed and the procedures for construction of the apparatus are detailed. Two experiments that use this equipment are suggested. Criteria for operation are listed. (CW)
Descriptors: Chemical Analysis, Chemical Reactions, Chemistry, College Science
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Birss, Viola I.; Truax, D. Rodney – Journal of Chemical Education, 1990
An approach which may be useful for teaching electrochemistry in freshman college chemistry courses is presented. Discussed are the potential problems with teaching this subject and solutions provided by this approach. (CW)
Descriptors: Chemical Equilibrium, Chemical Reactions, Chemistry, College Freshmen
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Baer, Carl D. – Journal of Chemical Education, 1990
Presented is an experiment which demonstrates principles of experimental design, solubility, and crystal growth and structure. Materials, procedures and results are discussed. Suggestions for adapting this activity to the high school laboratory are provided. (CW)
Descriptors: Chemical Reactions, Chemistry, College Science, Higher Education
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Vella, Alfred J. – Journal of Chemical Education, 1990
This paper suggests a nontraditional pedagogic approach to the subject of redox reactions and electrode potentials suitable for freshman chemistry. Presented is a method for the representation of galvanic cells without the introduction of the symbology and notation of conventional cell diagrams. (CW)
Descriptors: Chemical Equilibrium, Chemical Reactions, Chemistry, College Freshmen
Peer reviewed Peer reviewed
Birk, James P., Ed. – Journal of Chemical Education, 1990
Reviewed are six computer programs which may be useful in teaching college level chemistry. Topics include dynamic data storage in FORTRAN, "KC?DISCOVERER," pH of acids and bases, calculating percent boundary surfaces for orbitals, and laboratory interfacing with PT Nomograph for the Macintosh. (CW)
Descriptors: Atomic Structure, Chemical Reactions, Chemistry, College Science
Peer reviewed Peer reviewed
Paris, Michel R.; Aymes, Daniel J. – Journal of Chemical Education, 1990
The principles and procedures for three enthalpimetric measurement experiments including a determination of the water equivalent mass of the calorimeter, the calibration of the instrument, and determination of the dissociation heat of boric acid performed with a teacher-made instrument are presented. Suggestions for further experiments are…
Descriptors: Calorimeters, Chemical Reactions, Chemistry, College Science
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McKelvie, Ian D.; And Others – Journal of Chemical Education, 1990
Described is a 35mm projector demonstration which combines the advantages a highly magnified view of the sample zone as it undergoes dispersion and the ability to show more than a single-line flow injection analysis manifold. Manufacture and use of the slide for demonstration are discussed. (CW)
Descriptors: Chemical Reactions, Chemistry, College Science, Demonstrations (Educational)
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Zipp, Arden P. – Journal of Chemical Education, 1990
The materials needed and the procedures used in three microscale chemical laboratory experiments are detailed. Included are a microscale organic synthesis, a two-step synthetic sequence for the microscale organic laboratory, and a small-scale equilibrium experiment. (CW)
Descriptors: Chemical Analysis, Chemical Reactions, Chemistry, College Science
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Avila, Walter B.; And Others – Journal of Chemical Education, 1990
Described is a microscale organic chemistry experiment which demonstrates one feasible route in preparing ortho-substituted benzoic acids and provides an example of nucleophilic aromatic substitution chemistry. Experimental procedures and instructor notes for this activity are provided. (CW)
Descriptors: Chemical Analysis, Chemical Reactions, Chemistry, College Science
Peer reviewed Peer reviewed
Johnson, D. A. – Journal of Chemical Education, 1980
Suggests a way of distinguishing between the two classes of chemical reactions of the lanthanide series. (CS)
Descriptors: Chemical Reactions, Chemistry, College Science, Higher Education
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