Attempts to correlate students' evaluation scores of professors to final examination scores. Data given strongly indicate that there is no correlation between instructor effectiveness and final exam marks. Results are applicable only to large freshmen classes where most of the factors are common to all students. (Author/SA)

The authors provide criticisms of the teaching of organic chemistry in the United States. They suggest that changes be made in the method of presentation of the material, with topics introduced early in the course providing framework for subsequent material. (Author/SA)

Presents an historical review of the role of petroleum in world history and information on the chemistry of petroleum. It is suggested that petroleum chemistry be discussed since within the next two decades oil and gas will provide the major portion of U.S. energy. (Author/SA)

Presents an exercise for high school students on filling orbitals to help them gain an understanding of theoretical basis for the shape of periodic table. Preliminary instructions are outlined and followed by instructions to the teacher and questions and problems for the students. (Author/SA)

Questions are analyzed from various ACS-NSTA High School Chemistry Tests. Results show more than 50 percent of test questions deal with only six concepts and 70 percent evaluate aspects of only nine concepts. Results may be useful to teachers of college preparatory chemistry regarding subject matter and math operations. (Author/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)

Describes a nuclear debris collector which removes trace substances from the lower atmosphere during rainfall. Suggests that the collector could be implemented into courses at various educational levels and could result in developing a network for monitoring the geographical extent of nuclear contamination. (Author/SA)

Presents an experiment for inorganic, organic, or physical chemistry students utilizing acid-base titrimetry to study the stoichiometric of a solid state reaction. Time involved ranges from one to three, three-hour lab periods. (Author/SA)

Presents an experiment which uses readily available starting materials and inexpensive equipment for synthesis of transition metal carbonyls at 1000 atm and which is intended to give students experience in techniques used in research and industry. Safety precautions are emphasized. (Author/SA)

Describes a laboratory experiment which demonstrates manipulation of highly reactive chemicals, use of a gas trap, and simple and reduced pressure distillation. Student must characterize starting material and product with nuclear magnetic resonance and infrared spectroscopy. (Author/SA)

Polyelectrolytes are discussed with regard to their importance to the undergraduate science major enrolled in a physical chemistry course. Suggests the importance of the solution behavior of polyelectrolytes to scientific disciplines and many industries. (Author/SA)

Describes the use of benzophenone in the role of a solid state sensitizer in a photochemical isomerization and as an indicator in preparative layer chromatography for purification of the isomeride. (Author/SA)

Presents information intended to encourage students to become thoughtful consumers. Discusses the role of pepsin in splitting off amino acids from stomach proteins and the nature of the protein substrate in determining the ph at which pepsin operates. Directions for an experiment are included. (Author/SA)

Reports a study conducted to determine how students cope with a procedureless laboratory situation in physical chemistry. Students are expected to use ingenuity, determine choice of sample size, conditions, and temperature extrapolation in an experiment on measuring heat of solution of an unknown salt. (Author/SA)

Presents an improved technique for synthesizing acetanilide from nitrobenzene by reducing nitrobenzene with iron powder and hydrochloric acid. This experiment has been used successfully with 2,000 students during two semesters. (Author/SA)