Presents demonstrations on (1) ion exchange (softening hard water) and (2) vapor pressure measurement. (RH)

Presents a simple demonstration of optical activity and a simple method to show crystalline growth. (MLH)

Describes demonstrations of the ring strain inherent in cyclopropanes and cyclobutanes and their resultant high reactivity, and selective solubility principles. (MLH)

Discusses the preparation of compounds representing six oxidation states of manganese; demonstrations involving these compounds are described. (MLH)

Describes a room-temperature method for demonstrating phosphorescence by including samples in a polymer matrix. Also discusses the Old Nassau Reaction, a clock reaction which turns orange then black. (MLH)

Presents demonstrations concerning the thermodynamic properties of rubber elasticity and simultaneous reactions of acetone. (MLH)

Presents a recipe for the Nylon Rope Trick, which is considered to be one of the most spectacular demonstrations in chemistry. Materials for growing the polymer and some safety precautions are given. (SA)

An experiment is presented on the formulation of a negative photoresist. It is intended for use as a fifteen minute classroom demonstration for undergraduate general chemistry students. (SA)

Presents two demonstrations for classroom use related to precipitation of ferrous hydroxide and to variation of vapor pressure with temperature. The former demonstration is simple and useful when discussing solubility of ionic compounds electrode potential of transition elements, and mixed valence compounds. (Author/SA)

A lecture demonstration is presented for comparing titration curves. A plot of pH vs volume of strong base is produced by connecting the external output of a pH meter to a strip recorder. Thus, pH is recorded as a function of time. (BB)

Lecture-demonstrations are presented on the topics of measurement errors and formation and dissolution of precipitates. (BB)

Presents two demonstrations which are intended for chemistry college students. These demonstrations are: (1) enhancement of concentration quenching by micelles; and (2) the thermite lecture demonstration. (HM)

This experiment is intended as a classroom demonstration. It describes the preparation of materials, the procedure, and a few remarks related to demonstrating travelling waves of chemical activity in the Zaikin-Zhabotinskii-Winfree Reagent. (SA)

Demonstrations of Boyle's Law and of the relationship of gauge pressure and atmospheric pressure are presented. (BB)

Presents a method of adopting a pH meter for overhead projection. (SL)