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Showing 1 to 15 of 221 results Save | Export
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Hermanns, Jolanda; Schmidt, Bernd – Journal of Chemical Education, 2019
Stepped supporting tools were developed and used in the university seminar Organic Chemistry taken by nonmajor chemistry students, which supported self-regulated learning. These supporting tools were also used for accompanying homework, which included a QR code that led to additional supporting tools. The application of stepped supporting tools in…
Descriptors: Organic Chemistry, Science Instruction, College Science, Self Control
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Suroviec, Alice H.; Jones, Katarina; Sarabia, Grace – Journal of Chemical Education, 2019
Flavonoids have been studied extensively for their antioxidant properties. Specifically, the flavonoids in tea, such as catechin and epigallocatechin gallate, have been shown to have positive health effects. These compounds are also oxidizable, so the concentrations of these compounds in a given kind of tea can be determined using cyclic…
Descriptors: Science Instruction, Chemistry, Food, Hands on Science
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Pratt, Justin M.; Yezierski, Ellen J. – Journal of Chemical Education, 2019
College students associated with the American Chemical Society and Alpha Chi Sigma student/collegiate chapters reach almost 1 million people every year through their informal chemistry education events (chemistry outreach). Previous work has characterized their goals for chemistry outreach, with the most prevalent goal being audience learning.…
Descriptors: Chemistry, Science Instruction, Student Attitudes, Beliefs
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Mullins, Joseph J.; Prusinowski, Allen F. – Journal of Chemical Education, 2019
A microwave-promoted synthesis of a carbocyclic curcuminoid has been developed for the undergraduate organic chemistry laboratory curriculum. The experiment features several teaching points: A novel Knoevenagel iminium-mediated condensation forms a highly conjugated, intensely colored natural product. Reaction occurs uniquely at the less acidic…
Descriptors: Organic Chemistry, Laboratory Experiments, Undergraduate Students, Scientific Concepts
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Mack, Michael R.; Hensen, Cory; Barbera, Jack – Journal of Chemical Education, 2019
Quasi-experiments are common in studies that estimate the effect of instructional interventions on student performance outcomes. In this type of research, the nature of the experimental design, the choice in assessment, the selection of comparison groups, and the statistical methods used to analyze the comparison data dictate the validity of…
Descriptors: Science Instruction, Comparative Analysis, Inferences, Validity
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Harris, C.; Gaster, C.; Gelabert, M. C. – Journal of Chemical Education, 2019
Synthesis and characterization of nanomaterials yields opportunities for instruction of related topics in solution chemistry and materials science, as well as spectroscopy connecting to band theory, the "particle in a box" quantum mechanical model, and thermodynamics. In collaboration with an undergraduate research assistant, we have…
Descriptors: Science Instruction, Science Experiments, Chemistry, Thermodynamics
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Harrp, David N. – Journal of Chemical Education, 2018
Copying adjacent answer sheets on the oft-used multiple-choice exams can be prevented if exam material is scrambled. The latter mode has been a requirement for all exams of this type at McGill University for 26 years. Cheating by copying has been reduced to nearly zero in this time. The experiment carried out used permissive seating and a single…
Descriptors: Science Instruction, Chemistry, College Science, Foreign Countries
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Ghanem, Eman; Long, S. Reid; Rodenbusch, Stacia E.; Shear, Ruth I.; Beckham, Josh T.; Procko, Kristen; DePue, Lauren; Stevenson, Keith J.; Robertus, Jon D.; Martin, Stephen; Holliday, Bradley; Jones, Richard A.; Anslyn, Eric V.; Simmons, Sarah L. – Journal of Chemical Education, 2018
Innovative models of teaching through research have broken the long-held paradigm that core chemistry competencies must be taught with predictable, scripted experiments. We describe here five fundamentally different, course-based undergraduate research experiences that integrate faculty research projects, accomplish ACS accreditation objectives,…
Descriptors: Chemistry, Science Instruction, College Science, Undergraduate Study
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Rybolt, Thomas R.; Mebane, Robert C. – Journal of Chemical Education, 2018
A low-cost alternative to the typical scientific laboratory water bath or a hot plate stirrer water bath is proposed. Readily available immersion circulators have been developed for sous vide cooking. These precision cookers are designed to maintain water at an exact temperature and thus are well-suited for the similar laboratory requirements of a…
Descriptors: Science Instruction, Science Laboratories, College Science, Undergraduate Study
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Yin, Dezhong; Chen, Jinhua; Gu, Bin; Geng, Wangchang – Journal of Chemical Education, 2018
A new experiment based on phase inversion of Pickering emulsions was carried out in a physical chemistry course. The emulsions were stabilized by surfactant-modified SiO[subscript 2] particles. As the concentration of surfactant increased, the emulsions changed from oil-in-water type (O/W) to water-in-oil type (W/O) type, and then reverted to be…
Descriptors: Chemistry, Scientific Concepts, Scientific Principles, Laboratory Experiments
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Joseph, Ariana; Budden, Katherine; Cisek, Richard; Tokarz, Danielle – Journal of Chemical Education, 2018
In a university third-year instrumental chemistry laboratory students build a laser based polarimeter for determining light scattering with commercially available optical components used in modern optics research laboratories. During this laboratory experiment, students learn that solutions containing molecules which scatter light also influence…
Descriptors: Chemistry, Science Instruction, Undergraduate Students, Error Patterns
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Brown, Erin; de la Peña, Lisandro Hernández – Journal of Chemical Education, 2018
The quantum mechanics of a simplified Pöschl-Teller potential in one dimension is analyzed at an elementary level. The number of bound states of this potential is determined by a parameter "l" characterizing the depth of the potential energy. The resulting collection of potentials with varying depth, as well as their ground state…
Descriptors: Quantum Mechanics, Mechanics (Physics), Science Instruction, College Science
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Stieff, Mike; Werner, Stephanie M.; Fink, Bill; Meador, Dianne – Journal of Chemical Education, 2018
This paper examines the effectiveness of adding an online component to the general chemistry laboratory in which students view prelaboratory instructional materials through online videos prior to completing general chemistry laboratory activities. Using a quasi-experimental design, we compared the performance of 1089 general chemistry students who…
Descriptors: Video Technology, Electronic Learning, Student Improvement, Laboratory Procedures
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Lang, Peter F. – Journal of Chemical Education, 2018
This work outlines the inadequacies of the "ions in a sea of electrons" model. Some general properties of metals are stated. A different "soft/flexible" sphere model is described. The benefits of using this other model to account for metallic properties are discussed. Equations based on the soft sphere model are used to…
Descriptors: Inorganic Chemistry, College Science, Undergraduate Study, Science Instruction
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Brom, Joseph M. – Journal of Chemical Education, 2018
Molecular orbital configurations give rise to electronic terms comprising corresponding electronic states. Electronic terms possess symmetry classifications, which are denoted by a term symbol, based on the symmetry properties of the electronic wave functions associated with the states. Using the methylene radical, and both planar and twisted…
Descriptors: Chemistry, Science Instruction, Molecular Structure, Classification
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