Presents an alternative approach to teaching reaction thermodynamics in introductory chemistry courses using calculations of enthalpies, entropies, and free energies of atomization. Uses a consistent concept, that of decomposition of a compound to its gaseous atoms, to discuss not only thermodynamic parameters but also equilibrium and…

Describes the construction of a versatile, accessible, and inexpensive model to demonstrate the Valence-Shell Electron-Pair Repulsion Theory (VSEPR). Depicts the different orientation of valence electrons in an atom and the geometry of bonds and lone pairs in molecules. Offers the advantage of easily distinguishing lone pairs from bonds and…

Presents a simple experiment involving the sense of smell that students can accomplish during a lecture. Illustrates the important concepts of equilibrium along with the acid/base properties of various ions. (JRH)

Describes a method to visually demonstrate the working of an ion exchange column in lecture halls. (JRH)

Describes the "Teachers + Occidental = Partnerships in Science" (TOPS) program whose goal is to improve high school biology and chemistry students' laboratory instruction by enhancing their teachers' knowledge and classroom application of modern instruments, technology, and experiments. Includes 13 classroom-tested experiments that employ a…

Presents 6 short experiments with liquid nitrogen that 12- and 13-year-old students can safely perform under close supervision. Helps the students in learning a number of basic chemical principles while spurring their curiosity and showing them how much fun chemistry can be. (JRH)

Presents an experiment designed to test quantitatively for lead in household items. Generates interest from students because it relates to their lives and uses only a minimal amount of toxic chemicals. (JRH)

Discusses the role of higher education in the successful implementation of the National Science Education Standards (NSES) in K-12 science classrooms. Concludes that those who teach the teachers who are expected to transform schools must also be transformed. (DDR)

Discusses the relationship between teaching and research in higher education and how they are sometimes one and the same. Provides a perspective on scientific literacy, thoughts on the role of scientists in talking with the public about science, and the rationale for making a video course about chemistry. (DDR)

Discusses the format of a semester course and provides details about grading, formative assessment, research papers, lecture activities, cooperative examinations, use of spreadsheets, and open-ended laboratory projects. Contains 15 references. (DDR)

Describes a sequence of five experimental courses in chemical engineering that are designed to meet the needs of students with various learning styles. The courses use a variety of teaching methods and are designed to develop and enhance creative problem-solving. (DDR)

Describes a demonstration that illustrates the reversibility of thermal reactions using a gas burner and copper sulfate. Explains the procedure and provides tips to guide student thinking. (DDR)

Explains an experiment that can be used to help students visualize the phase changes of carbon dioxide. The equipment consists of tweezers and a small plastic syringe. Dry ice is also required. Results are discussed and the phase diagram for carbon dioxide is provided. (DDR)

Describes a demonstration known as Elephant's Toothpaste in which the decomposition of hydrogen peroxide is catalyzed by iodide. Oxygen is released and soap bubbles are produced. The foam produced is measured, and results show a good relationship between the amount of foam and the concentration of the hydrogen peroxide. (DDR)

Defines an exploratory lab as consisting of a series of hands-on, qualitative activities that are safe, simple, and inexpensive, use readily available supplies, and illustrate a concept being studied concurrently in the course. Summarizes the results of four years of testing the exploratory program. (DDR)