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Direct linkVero´nica Garci´a Rojas; Jhon Fredy Pe´rez Torres – Journal of Chemical Education, 2023
Auxiliary Tanabe-Sugano diagrams are presented. They enable a rapid and reliable graphical derivation of Dq/B and C/B crystal field parameter ratios from spectroscopic data. Using these values, one can calculate Dq and B by employing the original Tanabe-Sugano diagrams. Subsequently, C can also be calculated irrespective of the value C/B fixed in…
Descriptors: Metallurgy, Visual Aids, Science Education, Energy
Reisner, Barbara A.; Pate, Cole L.; Kinkaid, Melissa M.; Paunovic, Daniel M.; Pratt, Justin M.; Stewart, Joanne L.; Raker, Jeffrey R.; Bentley, Anne K.; Lin, Shirley; Smith, Sheila R. – Journal of Chemical Education, 2020
Classroom observation data using tools such as the Classroom Observation Protocol for Undergraduate STEM (COPUS) are frequently collected in instructional settings for large-scale research studies and program assessment. While COPUS data may be provided to instructors, it is often provided with little or no guidance on how the data can be used to…
Descriptors: Chemistry, Undergraduate Students, Data Use, Science Instruction
Williamson, J. Charles – Journal of Chemical Education, 2021
The lever rule applies to any two-component system existing in a state of two-phase equilibrium. Here, several classroom demonstrations are described to help students understand liquid--liquid coexistence and the lever rule using a set of isobutyric acid + water + dye samples ranging in composition from water + dye to isobutyric acid + dye. The…
Descriptors: Teaching Methods, Chemistry, Science Instruction, Visualization
Silverman, Julian R.; Hudson, Reuben – Journal of Chemical Education, 2020
Exciting developments in the field of Green Chemistry spur the continuous innovation of experiments in the teaching laboratory. Beyond learning practical techniques, students can critically assess experiments using relevant metrics to propose further improvements and identify the most important interconnected impacts of these alternative products…
Descriptors: Chemistry, Science Experiments, Science Instruction, Laboratory Experiments
Scott, Daniel; Hilt, Cole – Journal of Chemical Education, 2019
A multiweek laboratory experiment is described, which guides students to use data to make decisions through multiple steps, before reaching a final conclusion. The lab focuses on the comparisons of fluorescence and absorbance spectroscopies to determine the concentration of a desired substance in an unknown sample in consideration of a complex…
Descriptors: Spectroscopy, Inquiry, Active Learning, Critical Thinking
Sant'Anna, Rafaela T. P.; Monteiro, Emily V.; Pires, Romulo O.; Peres, Rosa C. D.; Faria, Roberto B. – Journal of Chemical Education, 2019
As 2019 is the 150th anniversary of the Mendeleev's Periodic Table, UNESCO has proclaimed this year the International Year of the Periodic Table (IYPT2019). One of the most important steps in the evolution of the Periodic Table is the concept of atomic number, established by Moseley. In this article, his work is commented on, and the emission of…
Descriptors: Chemistry, Nuclear Physics, Theories, Undergraduate Students
