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Pergantis, Spiros A.; Saridakis, Lakovos; Lyratzakis, Alexandros; Mavroudakis, Leonidas; Montagnon, Tamsyn – Journal of Chemical Education, 2019
Teaching the concept of pH buffers is considered to be important both in the final high-school years and at the early undergraduate level. Here, we propose the use of pH-log C diagrams to investigate the properties of pH buffers. This graphical approach is extremely simple to employ because it only requires drawing a simple square that can then be…
Descriptors: Visual Aids, Chemistry, Scientific Concepts, Concept Teaching
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Caicedo, Obradith; Devia-Ramirez, Jency; Malagón, Andrés – Journal of Chemical Education, 2018
Adsorption of methylene blue and malachite green was carried out using "Luffa cylindrica" sponges as adsorbing material. We provide a very illustrative exercise about the use of common natural materials requiring little preparation to solve environmental tasks in a routine laboratory situation such as using dyes. In addition, the…
Descriptors: Science Instruction, Science Laboratories, Chemistry, Scientific Concepts
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Murphy, Kevin V.; Turney, Justin M.; Schaefer, Henry F., III. – Journal of Chemical Education, 2018
Preceding even the Hartree-Fock method, molecular integrals are the very foundation upon which quantum chemical molecular modeling depends. Discussions of molecular integrals are normally found only in advanced and technical texts or articles. The objective of the present article is to provide less experienced readers, or students in a…
Descriptors: Teaching Methods, Molecular Structure, Chemistry, Science Instruction
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Kondratowicz, Izabela; Z?elechowska, Kamila – Journal of Chemical Education, 2017
The aim of this laboratory experiment is to utilize graphene oxide (GO) material to introduce undergraduate students to many well-known concepts of general chemistry. GO is a new nanomaterial that has generated worldwide interest and can be easily produced in every well-equipped undergraduate chemical laboratory. An in-depth examination of GO…
Descriptors: Undergraduate Students, Teaching Methods, Concept Teaching, Chemistry
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Alkilany, Alaaldin M.; Mansour, Sara; Amro, Hamza M.; Pelaz, Beatriz; Soliman, Mahmoud G.; Hinman, Joshua G.; Dennison, Jordan M.; Parak, Wolfgang J.; Murphy, Catherine J. – Journal of Chemical Education, 2017
A simple, reliable, and cost-effective experiment is presented in which students synthesized citrate-capped gold nanoparticles (GNPs), functionalized them with poly(ethylene glycol) (PEG), and transferred the PEG-GNPs from water to the organic phase dichloromethane. The experiment introduces students to nanotechnology with foci on important…
Descriptors: Chemistry, Science Instruction, Science Experiments, College Science
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Bandeira, Pamela T.; Thomas, Juliana C.; de Oliveira, Alfredo R. M.; Piovan, Leandro – Journal of Chemical Education, 2017
An experimental protocol that provides an excellent way to discuss concepts at the crossroads of organic chemistry and biochemistry employing biocatalysis is presented. By evaluating several reaction parameters (enzyme source, organic solvent, and acyl donor), it was possible to conduct an enzymatic kinetic resolution experiment using…
Descriptors: Science Instruction, Science Experiments, Biochemistry, Organic Chemistry
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Koenig, Emma; Jacobs, Ari; Lisensky, George – Journal of Chemical Education, 2017
Semiconductors are an important class of materials; preparing ZnO nanorods allows semiconducting properties to be easily observed. The week before lab, groups of four students take 15 min to setup two fluorine-doped tin oxide glass (FTO) slides in a zinc nitrate and hexamethylenetetramine solution stored at 90°C until the next lab. Hexagonal ZnO…
Descriptors: Science Instruction, College Science, Undergraduate Study, Inorganic Chemistry
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Guedens, Wanda J.; Reynders, Monique – Journal of Chemical Education, 2017
Prior to the recycling process, raising awareness of plastic waste impact, e.g., polluting oceans worldwide, is undoubtedly a first attempt to tackle this pandemic environmental issue. With this in mind, the presented practical session is an effort to entice an interdisciplinary audience of science undergraduates toward a sustainable future. The…
Descriptors: Plastics, Interdisciplinary Approach, Chemistry, Laboratory Experiments
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Horikoshi, Ryo; Takeiri, Fumitaka; Kobayashi, Yoji; Kageyama, Hiroshi – Journal of Chemical Education, 2016
We describe an activity that is suitable for high school students and makes use of plastic bottles. This activity allows students to familiarize themselves with gas chemistry by introducing technologies that were applied in old submarine systems. Plastic bottles, which are representative of submarines, are used as reaction vessels. Three simple…
Descriptors: Chemistry, Science Activities, Science Instruction, Secondary School Science
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Munegumi, Toratane; Inutsuka, Masato; Hayafuji, Yukitaka – Journal of Chemical Education, 2016
Although saliva has commonly been used to teach about digestion by organisms, the phenomenon of digestion is actually caused by enzymes as catalytic substances. This activity explores the hydrolysis of starch by "a"-amylase in cleaning materials as well as a comparison with the similar reaction using human saliva. The fact that the…
Descriptors: Chemistry, Science Instruction, Secondary School Science, Science Activities
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Kavak, Nusret; Yamak, Havva – Journal of Chemical Education, 2016
Laboratory activities are an important means of instruction in science; as such, they have been used in chemistry education since the 1880s. Many learning objectives can be achieved through the use of laboratory activities undertaken by chemistry students. In student-centered laboratory activities, students should know how to use an apparatus in…
Descriptors: Educational Games, Visual Aids, Laboratory Equipment, Science Instruction
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Kuntzleman, Thomas S.; Jacobson, Erik C. – Journal of Chemical Education, 2016
A very simple protocol for teaching Beer's Law and absorption spectrophotometry using a smart phone is described. Materials commonly found in high school chemistry laboratories or even around the house may be used. Data collection and analysis is quick and easy. Despite the simple nature of the experiment, excellent results can be achieved.
Descriptors: Science Instruction, Secondary School Science, Handheld Devices, Telecommunications
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Kosenkov, Dmytro; Shaw, James; Zuczek, Jennifer; Kholod, Yana – Journal of Chemical Education, 2016
The laboratory unit demonstrates a project based approach to teaching physical chemistry laboratory where upper-division undergraduates carry out a transient-absorption experiment investigating the kinetics of cis-trans isomerization of N,N-dimethyl-4,4'-azodianiline. Students participate in modification of a standard flash-photolysis spectrometer…
Descriptors: Climate, Spectroscopy, Science Instruction, Chemistry
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Wang, Jessie J.; Nun´ez, Jose´ R. Rodríguez; Maxwell, E. Jane; Algar, W. Russ – Journal of Chemical Education, 2016
A guided-inquiry project designed to teach students the basics of spectrophotometric instrumentation at the second year level is presented. Students design, build, program, and test their own single-wavelength, submersible photometer using low-cost light-emitting diodes (LEDs) and inexpensive household items. A series of structured prelaboratory…
Descriptors: Science Instruction, Undergraduate Study, College Science, Science Laboratories
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Smellie, Iain A.; Forgan, Ross S.; Brodie, Claire; Gavine, Jack S.; Harris, Leanne; Houston, Daniel; Hoyland, Andrew D.; McCaughan, Rory P.; Miller, Andrew J.; Wilson, Liam; Woodhall, Fiona M. – Journal of Chemical Education, 2016
A multidisciplinary experiment for advanced undergraduate students has been developed in the context of extractive metallurgy. The experiment serves as a model of an important modern industrial process that combines aspects of organic/inorganic synthesis and analysis. Students are tasked to prepare a salicylaldoxime ligand and samples of the…
Descriptors: Science Instruction, College Science, Undergraduate Study, Metallurgy
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