Suggests two uses for the programmable calculator in the freshman chemistry laboratory: as a means of determining whether or not a student's raw data from a laboratory experiment fall within acceptable tolerance limits; and as a means of checking the reliability of unknowns and grading on quantitative experiments. (MLH)

Describes a "feedback course" offered at Brown University, in which undergraduates redesigned the introductory organic chemistry laboratory. The students specified objectives for the ideal lab, then devised laboratory experiments. Laboratory safety was stressed, all dangerous reagents and solvents were eliminated, and toxicological data were…

Designed for first-year students of radiochemistry and atomic physics, this experiment tests the fundamental Moseley Law and introduces the method of elemental chemical analysis by X-ray fluorescence. (Author/MLH)

Describes an experiment for the undergraduate electricity and magnetism or mechanics laboratory to investigate free and driven oscillations. The RLC circuit is pulsed with a pulse generator when free oscillation is being studied and is driven with a low-impedance sinusoidal generator when driven oscillation is being studied. (Author/MLH)

Describes an apparatus suitable for measuring magnetic susceptibility in the undergraduate laboratory. Several applications are considered in detail, and extension of the technique to nonmagnetic studies is briefly discussed. (Author)

Provides abstracts and materials requirements for 20 chromatography projects. Experiments range in complexity; some require synthesis steps, apparatus construction, or special preparation techniques. (MLH)

Describes an experiment, for the general chemistry laboratory, intended to introduce the student to infrared spectroscopy. After being introduced to the theory of molecular vibrations on an elementary level, each student receives a list of 5-7 nickel (II) ammines to be prepared, analyzed and characterized by infrared spectoscopy. (MLH)

Describes the use of biofeedback machines in biology classes which provide students with an awareness of their own brain waves and as a device to demonstrate the fact that the body responds readily to the mind. (BR)

Describes an experiment wherein the student can demonstrate the existence of all the thiocyanato chromium complexes, estimate the stepwise formation constants, demonstrate the robustness of chromium III complexes, and show the principles of paper electrophoresis. (GS)

Describes an experiment that will acquaint the student with the ion-exchange model, yield data which fit nicely to a computer type analysis, introduce the preparation of electrodes, provide a unique experience with elevated temperatures and ionic solvents, and provide experience in electrometric measurements. (GS)

Describes an experiment that illustrates the use of the preparative ultracentrifuge in isolating and purifying bacterial ribosomes, determines the sedimentation coefficients of the ribonucleoprotein particles, and demonstrates the subunit structure of the 70-S ribosome and the role of the magnesium ion in the association of subunits. (Author/GS)

Describes a laboratory experiment designed to merge the concepts and techniques of the analytical-organic-physical subdivisions and introduce the student to a decision-making situation. Presents a discussion of the use of the experiment in attaining these goals and provides typical data obtained by students. (GS)