Describes and compares procedures and results of determination of colorimetric, potentiometric, and amperometric endpoints of an oxidative titration of arsenite by iodine. (TS)

Describes a contract grade system utilized in the Essex County College, New Jersey freshman chemistry course. A time extension provision is designed to permit students to complete activities. (TS)

Describes an alternative method to algebraic procedures for solving problems involving the proportional composition of a mixture. (TS)

Considers a few aspects of the composition and physical chemistry of seawater and of the processes affecting oxygen in the ocean. (TS)

Reviews various kinds of thick-film lubricants and thin-film lubricants which may be useful under the extreme conditions encountered in space travel. (PR)

Argues that chemistry has major implications for our understanding of the nature of things including ourselves. Illustrations have been drawn from the chemical elements, chemical equilibria, and chemical entropy. Chemistry should not be presented as something justified only by its practical results while the other sciences raise the ultimate…