Shows how to make stereo slides of three-dimensional molecular models. The slides have been used to teach chirality, conformational isomerism, how models and two-dimensional representations embody selected aspects of structure, and fundamentals of using the specific model set required in a particular organic chemistry course. (JN)

Provides background information for teachers on the atomic density of the elements as pure crystals. Atomic density is defined as the reciprocal of the atomic volume. Includes atomic-density diagrams which were prepared using the atomic-volume values given by Singman, supplemented by additional values for some allotropes. (JN)

Provides instructions for making, inexpensively from envelopes, two polyhedra that illustrate chemical geometries. The individual steps involved, supported by detailed diagrams, are included. (JN)

The concept of an ideal solution is ordinarily introduced in freshman chemistry by means of Raoult's Law, which states that the vapor pressure of a volatile component of a solution is proportional to its mole fraction. The relationship of this law to molecular size is discussed. (JN)

Outlines procedures for producing both 35-mm and overhead transparencies using a photocopier with a reducing capability. (JN)

Addresses issues related to the use of microcomputers for solving problems. Includes considerations of the impact of software availability, the nature of software for chemical education, general-purpose software, and dedicated software. (JN)

As alternatives to the well-known Kodak Kodalith film for making presentation slides, suggests using Kodak Technical Pan Film, 2415 and Kodak Precision Fine Film LPD4. Although less known, both films are capable of making excellent quality slides with minimum effort and, for the occasional user, offer advantages over the Kodalith-Diazochrome…

Provides a list of common words together with definitions of their technical meanings. Indicates that there is a language gap between the technical meanings and the meanings that students have for these words. (JN)

Describes a carefully integrated presentation of visuals, demonstrations, stage magic, and music used to familiarize laypersons as well as students with the applications and fascination of modern chemistry. Suggests that this approach can be used by others for classroom and/or public-oriented ventures. (JN)

Describes: (1) demonstrations that have led to serious injury and should not be repeated; (2) demonstrations that are questionable because of the potential for injury; and (3) worldwide demonstrations that should be done, but done with care. Includes nature of potential/actual hazards, procedures used, and reactions involved. (JN)

Describes two demonstrations that require almost no preparation time, are visually stimulating, and present a variety of material for class discussion (with sample questions provided). The first involves a sodium bicarbonate hydrochloric acid volcano; the second involves a dissolving polystyrene cup. Procedures used and information on…

Describes an experiment (carried out in less than two hours) in which the merits of countercurrent extraction are immediately evident by visible colors. The experiment requires eight 125-ml separatory funnels, 250ml of 1-butanol, 250ml of 0.1-0.5 molar hydrochloric acid, and a small amount of Sheaffer's Skrip blue-black soluble ink. (JN)

Background information, procedures used, and typical results obtained are provided for an experiment involving the separation of chlorophyll a and chlorophyll b from their diastereomers. Reasons why the experiment can be easily integrated into most laboratory curricula where high-performance liquid chromatography capabilities exist are given. (JN)

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

A cost-analysis competition was introduced into the experimental synthesis sequence of an organic chemistry course. Rationale for the approach as well as experiments involved are discussed. (JN)