This document is an instructional module package prepared in objective form for use by an instructor familiar with the procedures for chlorine residual analysis. It includes objectives, an instructor guide, and student handouts. The module addresses the determination of combined and free residual chlorine in water supply samples using three…

This document is an instructional module package prepared in objective form for use by an instructor familiar with the spectrophotometric analysis of total iron, filtrable iron and ferrous iron in a water supply. Included are objectives, an instructor guide, student handouts, and transparency masters. A video tape is also available from the…

This document is an instructional module package prepared in objective form for use by an instructor familiar with fluoride analysis procedures. Included are objectives, an instructor guide, student handouts, and a list of reference material. This module considers the determination of fluoride in water supplies using the SPANDS and electrode…

This document is an instructional module package prepared in objective form for use by an instructor familiar with hardness analysis using the EDTA method and the calculation of hardness given metal ion concentrations and a factor table. Included are objectives, an instructor guide, student handouts, and transparency masters. A video tape is also…

The purpose of the study was to determine differences in chemistry resulting from a traditional and an independent technique of teaching. The population included four chemistry classes at Scottsdale Saguaro High School. Intact groups were assigned to experimental or control groups by random processes. The control group was presented the CHEM Study…

The purpose of this study was to determine the effectiveness of doubling the laboratory experiments and time in the laboratory on student achievement, performance on laboratory skills, and attitude toward high school chemistry. One hundred forty-three students were assigned either of two treatments. All students performed the same basic…

This investigation explored the question of how high school chemistry students best learn three-dimensional molecular, ionic, and metallic structures in CHEM Study (Freeman, 1963). The experimenter compared the achievement, attitude, and instructional preferences of 110 randomly selected students taught by two different methods: (1) student…

The second edition of the Toxic Substances List, containing some 13,000 entries, is prepared annually by the National Institute for Occupational Safety and Health (NIOSH) in compliance with the Occupational Safety and Health Act of 1970. The purpose of the List is to identify all known toxic substances but not to quantitate the hazard. The List…

This was a quantified study on the learning of certain theoretical topics in general chemistry as influenced by two methods of visual technique (single concept films, overhead projections). Four classes of chemistry students (non-science majors) registered in sections on a random basis, participated. Objective, multiple choice tests on each of the…

The ultimate goal of this study was to specify conditions which affect achievement in the chemistry laboratory through an understanding of instructor-student interaction. The Flanders System of Interaction Analysis was used to measure the ratio of indirect to direct teaching (I/D/ Ratio) during pre-lab and post-lab sections of eight two-hour…

This report represents the efforts of two schools of higher education in northern Wisconsin to keep Lake Superior, the largest surface area, fresh water lake in the world, close to the condition it was in thousands of years ago when it was formed. The University of Wisconsin-Superior and Northland College have been studying, since 1972, water…

The report represents the efforts of two schools of higher education in northern Wisconsin to keep Lake Superior, the largest surface area, fresh water lake in the world, close to the condition it was in thousands of years ago when it was formed. The University of Wisconsin-Superior and Northland College have been studying, since 1972, water…

Total mercury in ambient air can be collected in iodine monochloride, but the subsequent analysis is relatively complex and tedious, and contamination from reagents and containers is a problem. A sliver wool collector, preceded by a catalytic pyrolysis furnace, gives good recovery of mercury and simplifies the analytical step. An instrumental…

The Inverted File Information Retrieval System (INFIRS), is a document search system which offers a comprehensive range of search facilities. It has been developed at the United Kingdom Chemical Information Service (UKCIS) as a general purpose retrieval tool, suitable for handling a wide variety of data-bases (both free-text and controlled…

This second volume of UNESCO's series on New Trends in Chemistry Teaching presents papers originally published during 1966 and 1967 in leading chemistry-teaching periodicals of the world. The papers have been grouped in sections - structure, energetics and kinetics, acids and bases, organic chemistry, electrochemistry, chemistry and industry,…