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Manae, Meghna A.; Hazra, Anirban – Journal of Chemical Education, 2019
There exist several two- and three-dimensional graphical representations of hydrogen-like orbitals. Despite this, connecting the mathematical form of the atomic orbital, a function of both radial and angular variables, to its actual shape is often challenging for students. Here, we present a new graphical representation using bubble plots to show…
Descriptors: Visual Aids, Science Instruction, Scientific Concepts, College Students
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Nagel, Thomas; Mentzer, Casey; Kivistik, P. Mike – Journal of Chemical Education, 2019
This experiment provides students with a thorough understanding of electrolysis and the parameters that most greatly impact optimization of this process. In this laboratory exercise, students will focus on the anodization of bismuth metal to develop thin oxide films. When designing an electrolytic cell devoted to anodization, there are several…
Descriptors: Cytology, Science Instruction, Laboratory Experiments, Teaching Methods
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Barrera, Luis A.; Alma C. Escobosa; Alsaihati, Laila S.; Noveron, Juan C. – Journal of Chemical Education, 2019
Herein we present a modified iodine clock experiment which replaces starch with cellulose paper. This provides the reaction with a white solid surface in which color change can be clearly observed and reduces reagent amounts required to 540 µL per group. After data acquisition, students are required to calculate reaction orders and the reaction…
Descriptors: Science Experiments, Chemistry, Kinetics, Science Laboratories
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Wilson, Sarah Beth; Varma-Nelson, Pratibha – Journal of Chemical Education, 2019
The purpose of this parallel convergent mixed methods study was to characterize organic chemistry students' expression of electron-pushing formalism skills who had participated in peer-led team learning (PLTL) and cyber peer-led team learning (cPLTL), a synchronous online version of peer-led team learning (PLTL) workshops. A new electron-pushing…
Descriptors: Science Instruction, Organic Chemistry, College Science, Undergraduate Study
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Fedick, Patrick W.; Schrader, Robert L.; Ayrton, Stephen T.; Pulliam, Christopher J.; Cooks, R. Graham – Journal of Chemical Education, 2019
Process analytical technologies (PATs) are used in the pharmaceutical and other industries to monitor chemical processes in real-time with analytical instrumentation. Each PAT analyzer brings its own advantages and disadvantages to the process, and multiplexing PAT analyzers can be advantageous as they can provide confirmatory measurements and…
Descriptors: Science Education, Spectroscopy, Laboratory Equipment, Science Laboratories
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Limpanuparb, Taweetham; Kanithasevi, Siradanai; Lojanarungsiri, Maytouch; Pakwilaikiat, Puh – Journal of Chemical Education, 2019
We discuss the use of a simple piece of equipment made of a 50 mL syringe attached to a 2 mL graduated pipet to demonstrate Boyle's law and Charles's law. A plot of the hydrostatic pressure against the reciprocal of the volume of the gas read from the equipment is linear as discussed in the paper and gives the atmospheric pressure at the…
Descriptors: Science Instruction, Science Experiments, Science Laboratories, Laboratory Experiments
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Elliott, Leslie Atkins; Sippola, Elizabeth; Watkins, Jeffrey – Journal of Chemical Education, 2019
In this article, we describe how the Gaussian Gun, a simple configuration of magnets and ball bearings, can be leveraged to connect ideas from physics to representations and ideas that are central to chemistry and challenging for students to learn. In particular, we show how the Gaussian Gun, an arrangement of ball bearings and magnets, models…
Descriptors: Science Instruction, Chemistry, Physics, Magnets
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Neuman, Annette W.; Harmon, Brenda B. – Journal of Chemical Education, 2019
An integrated lab-lecture project, known as the mini research project, was developed for a medicinal chemistry course for nonscience majors. In the lecture component of this project, students choose a plant essential oil with documented biological activity and prepare a literature review describing the importance, history, and current use of the…
Descriptors: Science Instruction, Science Laboratories, Chemistry, Nonmajors
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Grosso, Carla; Liber, Marta; Brigas, Amadeu F.; Pinho e Melo, Teresa M. V. D.; Lemos, Américo – Journal of Chemical Education, 2019
Regioselectivity in hetero Diels-Alder reactions can be observed in a simple reaction between a nonsymmetrical heterodiene and an unsymmetrical heterodienophile. A 9 h and easy to implement laboratory experiment is described, in which students can observe the regioselectivity of inverse "electron-demand" hetero Diels-Alder reactions of…
Descriptors: Science Instruction, Scientific Concepts, Science Experiments, Laboratory Experiments
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Agcali, Rahime Yagmur; Atik, Bahar; Bilgen, Ecenaz; Karli, Berfu; Danisman, Mehmet Fatih – Journal of Chemical Education, 2019
Understanding the concepts of quantum mechanics has always been a challenge for undergraduate students. This is especially so because many of the introductory (analytically solvable) systems and problems discussed in textbooks are seemingly abstract. Using approximate experimental demonstrations of such systems and problems have been shown to be…
Descriptors: Science Instruction, Undergraduate Students, College Science, Quantum Mechanics
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Calcabrini, Mariano; Onna, Diego – Journal of Chemical Education, 2019
The study of gels and their properties is a compelling topic both technologically and scientifically, and should therefore be emphasized in chemistry and material science syllabuses. In the present laboratory experiment, we propose two experiences, aimed at introducing gelation and gel transport properties using silica gels made from sodium…
Descriptors: Science Instruction, Science Laboratories, Laboratory Experiments, Science Experiments
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Kwan, Ann H.; Mobli, Mehdi; Schirra, Horst J.; Wilson, Jennifer C.; Jones, Oliver A. H. – Journal of Chemical Education, 2019
Magnetic resonance is a powerful technology that has had a major impact across the physical, life, and medical sciences, from chemistry to medical imaging, with ever-expanding applications in new areas as diverse as mining and food science. It is, however, also a difficult subject to teach, as the theory is complex and requires some familiarity…
Descriptors: Undergraduate Students, College Science, College Faculty, Video Technology
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Boys, Alexander J.; Walsh, Mark C. – Journal of Chemical Education, 2019
Elementary and middle school science curricula typically focus on generating an interest in science and engineering through the use of hands-on activities that demonstrate specific concepts. Laboratory activities designed in this manner often circumvent some of the main challenges that engineers and scientists face, namely balancing advantages and…
Descriptors: Elementary School Students, Middle School Students, Science Instruction, Science Laboratories
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Esselman, Brian J.; Block, Stephen B. – Journal of Chemical Education, 2019
The VSEPR model has well-established limitations in its ability to represent accurate molecular and electronic geometries of simple molecules, which can create a significant need for students to relearn structure and bonding concepts in organic chemistry. We present an alternate method for describing molecular geometries and electronic structures…
Descriptors: Science Instruction, College Science, Undergraduate Study, Scientific Concepts
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Ryan, Stephanie A. C.; Stieff, Mike – Journal of Chemical Education, 2019
Extant research on the efficacy of drawing for assessing learning in chemistry suggests it may provide richer information on the quality of students' mental models. Here, we examine the relative utility of formative assessments that involve drawing modalities as well as verbal and symbolic modalities. We analyzed the drawings, written…
Descriptors: Chemistry, Science Instruction, Outcomes of Education, Schemata (Cognition)
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