Describes a simple procedure for carrying out ultra-micro boiling point determination, presenting typical results obtained. Advantages of using the procedures are noted. (JN)

Background information, procedures used, and typical results obtained are provided for experiments involving the nitrile oxide cycloaddition with enamines. The experiment is suitable for advanced undergraduate organic laboratories or beginning undergraduate research. (JN)

Background information, list of required materials, and procedures are provided for an immunological assay which has been modified for use as a classroom/laboratory demonstration of antigen-antibody reaction. The assay is designed for a two and one-half hour laboratory period but may be modified for one hour laboratories. (JN)

Discusses a laboratory exercise (suitable for the day before spring vacation) involving use of a hard-boiled egg to stimulate student responses to questions on the effect of adding salt to the water, formation of iron sulfide, ease of peeling, and gas laws. Additional experiments are included. (BC)

The separation of lead and bismuth by chelate solvent extraction is of interest because of the simplicity which the use of radiotracers allows in its demonstration. Theoretical background information, procedures, materials needed, and typical results are provided for an experiment involving the extraction. (JN)

Describes a procedurally quick, simple, and inexpensive experiment which illustrates the magnitude and some effects of solvent-ion interactions in aqueous solutions. Theoretical information, procedures, and examples of temperature, volume and hydration number calculations are provided. (JN)

Describes an experiment in which students: (1) synthesize tris(acetylacetonato)iron(III), tris(diethyldithiocarbamato)iron(III), and chlorobis(diethyldithiocarbmamato)iron(III); (2) are given a sample of potassium hexocyanoferrate(III); and (3) are then asked to measure the room temperature of these samples using the Guoy technique. Background…

Using different supporting electrolytes, the influence of complex-forming equilibria on migration velocities of strontium-90 and yttrium-90 can be demonstrated in this experiment. Includes procedures and materials needed. (SK)

Describes a set of undergraduate laboratory experiments which provide experience in deuteration and derivatization procedures applied to infrared spectroscopy. Basic skills in vacuum-line technique are also taught while measuring infrared spectra of deuterated solid samples and demonstrating the value of derivatization as an aid to interpreting…

Highlights procedures and results of an experiment using atomic absorption spectroscope to illustrate a fundamental chemical concept. The experiment demonstrates the dependence of the solubility product of lead sulfate on ionic strength in the presence of a slight excess of anion. (Author/JN)

Experimental procedures and typical student data/results are provided for an experiment determining the sodium (parts per million) in salt substitute with an error of a few percent. Problems encountered with the technique are addressed. (Author/JN)

Described is a conductiometric method for following the course of diffusion of aquated ions through a cellulose membrane. Several experiments using the method are described. (Author/SA)