This experiment presents one direct titration for water soluble base and an indirect titration after dissolving a sample (oak ashes) in a known excess of acid. A titer method of calculation is given to allow use by students without knowledge of molarity-volume-mole calculations. (Author/JN)

Describes how a sulfate-iodide "clock reaction" experiment can be used to emphasize the importance of observations and hypotheses in revealing cause-effect relationships. Investigative steps, theory, experimental principle, procedure, and the experiment report are discussed. (CS)

Procedures are provided for separating the principal metalloproteins (albumin, ceruloplasmin, and transferrin) from plasma using column chromatographic techniques. The experiment can be completed in two separate three-hour laboratory periods during which column chromatography is illustrated and the effect of pH on charge and affinity of a protein…

A hydrodynamic modulation voltammetry (HMV) experiment involving use of simple hydrodynamic modulation procedures is described. Competing with time/equipment restrictions of most teaching laboratories (stopped-stirring and stopped-flow volumetry), students perform both batch and flow analyses and are introduced to analytical flow systems and the…

Use of phase transfer agents to facilitate/accelerate chemical reactions has become an established practice, particularly in organic chemistry. Describes an undergraduate laboratory procedure demonstrating the principles involved in the use of said agents. Includes student results from phase transfer assisted permanganate oxidations. (Author/JN)

Describes experiments using dye solutions in liquid crystals in which polar molecules are oriented in an electrical field and devices are constructed to change their color in response to an electric signal. (CS)

The author offers laboratory procedures for experiments using the bacterium, Agrobacterium tumefaciens, which causes crown gall disease in a large number of plants. Three different approaches to growing a culture are given. (SA)

Presents background information, materials, calculations, and laboratory procedures for a physical chemistry experiment focused on the thermodynamics of a galvanic cell. (JN)

Examines the controversy surrounding the validity and interpretation of electron microscope images. (DS)

Presents background information, safety notes, and laboratory procedures for synthesizing dinitrogen and dihydrogen complexes of molybdenum. The one-step method described is suitable for advanced inorganic chemistry classes. (SK)

Describes an experiment in which a recycling oscillator has been designed having a fiber optic data link that closes the loop. Outlines the use of this wink-around system to determine the speed of light and suggests additional application for measuring integrated circuit propagation delays to subnanosecond resolution. (GS)

Describes a procedure for the synthesis and characterization of cobalt (III) complexes in one 6-hour laboratory period. Hydrogen peroxide is used for speeding up the preparation of these complexes if solutions are heated to complete the reaction. (Author/JN)

Describes a method suitable for quantitative studies of plant water status conducted by high school or college students and the calculation of the relative water content (RWC) of a plant. Materials, methods, procedures, and results are discussed, with sample data figures provided. (CS)

Describes an experiment on heat that utilizes only a styrofoam cup of coffee and a soda straw thermometer. (BT)

This laboratory experiment was designed for undergraduate students. It demonstrates the use of simplex optimization in a simple and straightforward manner. (BB)