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Shibley, Ivan A., Jr.; Amaral, Katie E.; Aurentz, David J.; McCaully, Ronald J. – Journal of Chemical Education, 2010
A variety of approaches to the concept of oxidation and reduction appear in organic textbooks. The method proposed here is different than most published approaches. The oxidation state is calculated by totaling the number of heterogeneous atoms, [pi]-bonds, and rings. A comparison of the oxidation states of reactant and product determine what type…
Descriptors: Textbooks, Organic Chemistry, Scientific Concepts, Courses
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Lee, Liangshiu – Journal of Chemical Education, 2010
The basis sets for symmetry operations of d[superscript 1] to d[superscript 9] complexes in an octahedral field and the resulting terms are derived for the ground states and spin-allowed excited states. The basis sets are of fundamental importance in group theory. This work addresses such a fundamental issue, and the results are pedagogically…
Descriptors: Chemistry, Higher Education, Teaching Methods
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Alaimo, Peter J.; Langenhan, Joseph M.; Tanner, Martha J.; Ferrenberg, Scott M. – Journal of Chemical Education, 2010
We developed and implemented a yearlong safety program into our organic chemistry lab courses that aims to enhance student attitudes toward safety and to ensure students learn to recognize, demonstrate, and assess safe laboratory practices. This active, collaborative program involves the use of student "safety teams" and includes…
Descriptors: Student Attitudes, Laboratory Safety, Organic Chemistry, Science Laboratories
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Gil, Victor M. S.; Paiva, Joao Carlos – Journal of Chemical Education, 2010
Any student is expected to know that correct prediction is a necessary, but not a sufficient, condition any theory must meet to be acceptable. However, an eventual weakening of reflective and critical attitudes when dealing with "whats" and "whys" in science learning can easily lead to an identification of the predictive…
Descriptors: Textbooks, Models, Prediction, Chemistry
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Murphy, Thomas J. – Journal of Chemical Education, 2009
There are significant contradictions in undergraduate organic chemistry textbooks as to the mechanism of nucleophilic substitution reactions at saturated secondary carbons. Some texts say that only the S[subscript N]2 mechanism operates, others say that solvolysis reactions go entirely by the S[subscript N]1 mechanism, while most texts say that…
Descriptors: Organic Chemistry, Textbooks, Chemistry, Kinetics
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Mundell, Donald W. – Journal of Chemical Education, 2009
Intermolecular forces and surface tension gradients in solutions lead to remarkable flows, known as Marangoni flows, where liquid flows from a region of low surface tension towards higher surface tension. Details of these flows, not visible to the naked eye, are made visible on an overhead projector owing to variation in the index of refraction.…
Descriptors: Projection Equipment, Chemistry, Human Body, Gardening
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Goll, James G.; Wilkinson, Lindsay J.; Snell, Dolores M. – Journal of Chemical Education, 2009
The first artificial satellite, Sputnik, was launched over fifty years ago, on October 4, 1957, marking the beginning of the space age. The launch of Sputnik inspired coal miners' sons in Coalwood, West Virginia, to form a rocket research program. The story of these coal miners' sons was told by Homer Hickham, Jr., in the book Rocket Boys: A…
Descriptors: Fuels, Satellites (Aerospace), Chemistry, Classrooms
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Canaes, Larissa S.; Brancalion, Marcel L.; Rossi, Adriana V.; Rath, Susanne – Journal of Chemical Education, 2008
A classroom exercise for undergraduate and beginning graduate students that takes about one class period is proposed and discussed. It is an easy, interesting exercise that demonstrates important aspects of sampling techniques (sample amount, particle size, and the representativeness of the sample in relation to the bulk material). The exercise…
Descriptors: College Students, Statistical Data, Sampling, Evaluation
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Sierra, Manuel Gonzalez; Pellegrinet, Silvina C.; Colombo, Maria I.; Ruveda, Edmundo A. – Journal of Chemical Education, 2008
An exercise on structure elucidation for advanced undergraduate students is described. To determine the structure of an unknown product, students are required to use spectra together with an organic chemistry mechanism. This exercise exemplifies the procedure commonly used in research, thus helping students develop problem-solving skills. In…
Descriptors: Undergraduate Students, Organic Chemistry, Higher Education, Problem Solving
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Shaver, Lee Alan – Journal of Chemical Education, 2008
The determination of phosphates by the classic quimociac gravimetric technique was used successfully as a laboratory experiment in our undergraduate analytical chemistry course. Phosphate-containing compounds are dissolved in acid and converted to soluble orthophosphate ion (PO[subscript 4][superscript 3-]). The soluble phosphate is easily…
Descriptors: Chemistry, Laboratory Experiments, Undergraduate Students, Higher Education
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Sun, Luyi; O'Reilly, Jonathan Y.; Tien, Chi-Wei; Sue, Hung-Jue – Journal of Chemical Education, 2008
A simple and effective approach to prepare conductive polystyrene/carbon nanofiber (PS/CNF) nanocomposite films via a solution dispersion method is presented. Inexpensive CNF, which has a structure similar to multi-walled carbon nanotubes, is chosen as a nanofiller in this experiment to achieve conductivity in PS films. A good dispersion is…
Descriptors: Chemistry, Laboratory Experiments, Science Curriculum, Higher Education
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Gerber, Ralph W.; Oliver-Hoyo, Maria T. – Journal of Chemical Education, 2008
This experiment is designed to expose undergraduate students to the process of selective etching by using soft lithography and the resulting electrical properties of multilayered films fabricated via self-assembly of gold nanoparticles. Students fabricate a conductive film of gold on glass, apply a patterned resist using a polydimethylsiloxane…
Descriptors: Undergraduate Students, Science Instruction, Experiments, Higher Education
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Ito, Takashi; Perera, D. M. Neluni T.; Nagasaka, Shinobu – Journal of Chemical Education, 2008
This article describes an undergraduate electrochemistry laboratory experiment in which the students measure the L-ascorbic acid content of a real sample. Gold electrodes modified with self-assembled monolayers (SAMs) of thioctic acid and cysteamine are prepared to study the effects of surface modification on the electrode reaction of L-ascorbic…
Descriptors: Chemistry, Laboratory Experiments, Higher Education, Undergraduate Students
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Bauer, Jurica; Tomisic, Vladislav; Vrkljan, Petar B. A. – Journal of Chemical Education, 2008
A simple method for studying the kinetics of a chemical reaction is described and the significance of reaction orders in deducing reaction mechanisms is demonstrated. In this student laboratory experiment, oxidation of iodide by iron(III) ions in an acidic medium is transformed into a clock reaction. By means of the initial rates method, it is…
Descriptors: Kinetics, Chemistry, Laboratory Experiments, Regression (Statistics)
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Clausen, Thomas P.; Green, Thomas K.; Steiner, Benjamin – Journal of Chemical Education, 2008
In teaching organic chemistry laboratory at this university, we eliminated the use of "canned" experiments from textbooks. Instead, we present students with literature studies that form the basis of developing new unpublished experiments to answer specific questions. In this research approach, students are better exposed to the chemical…
Descriptors: Research Design, Organic Chemistry, Higher Education, Teaching Methods
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