Describes an experiment in which several metallo complexes with different central atoms are prepared. Background information on these compounds is provided, including requirements for their formation, preparation methods, and comments on their general properties and analysis. (JN)

Carbaryl, 1-naphthyl-N-methylcarbamate, is the biodegradable (soft) insecticide most commonly marketed by the Union Carbide Corporation under the trade name of Sevin. Procedures for the synthesis and testing of carbaryl and for the testing of some compounds similar to carbaryl are provided. Equations showing its synthesis from methyl isocyanate…

Discussed are various types of electronic laboratory balances. (RH)

Describes a method of identifying students who are poorly prepared for freshman chemistry, and a preliminary chemistry course designed to prepare such students for the standard chemistry course. (MLH)

Describes a study showing that the results of a practical laboratory examination correlated more positively with written examination scores than the teaching assistant's evaluation of laboratory technique. (MLH)

Describes a laboratory experiment in which the students construct and calibrate ion-selective electrodes, then use them to analyze an unknown. (MLH)

Described are available electronic laboratory balances. Information was supplied by the manufacturers or importers. (RH)

A variety of materials are described including spectrophotometers, chromatographs, voltmeters, recorders, and simple laboratory equipment. (RH)

Uses the intersecting parabola model to derive an equation that relates the observed free energy of activation for a slow proton transfer to the overall thermodynamic free energy change in the reaction. (MLH)

Presents three brief articles that consider the recovery of silver from film, field trips as a supplement to science major general chemistry laboratory, and the construction of a low-cost colorimeter. (MLH)

Discusses the preparation and properties of nitrogen oxides and the reaction of magnesium with nitric acid. (MLH)

Describes an experiment that utilizes a potentiometric, redox titration in N, N-dimethylformamide. (MLH)

Describes the chemistry of dyeing, including acid, basic, vat, and disperse dyes. Includes laboratory experiments. (MLH)

Describes eleven laboratory experiments, including the catalytic effect of copper in zinc-acid reaction; a study of the rate of polymerization of some aldehydes; and a demonstration automatic potentiometric titrator. (MLH)

Presents designs for atomic models for building small cyclic molecules and demonstrates their use in the construction of beta-lactam antibiotic structures. (MLH)