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Bayline, Jennifer Logan; Tucci, Halie M.; Miller, David W.; Roderick, Kaitlin D.; Brlectic, Patricia A. – Journal of Chemical Education, 2018
Candy, an everyday treat, is a convenient theme for teaching chemistry. Making candy incorporates solution concentration, colligative properties, and phase transformations while flavoring and color reflect synthesis or extraction. In this article, a nonscience major laboratory course on candy chemistry is presented. The course combines laboratory…
Descriptors: Science Instruction, Chemistry, Science Laboratories, Nonmajors
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Rappon, Tim; Sylvestre, Jarrett A.; Rappon, Manit – Journal of Chemical Education, 2016
Flotation as a method of separation is widely researched and is applied in many industries. It has been used to address a wide range of environmental issues including treatment of wastewater, recovery of heavy metals for recycling, extraction of minerals in mining, and so forth. This laboratory attempts to show how such a simple method can be used…
Descriptors: Science Instruction, Laboratory Experiments, Science Experiments, Science Laboratories
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Morizot, Olivier; Audureau, Eric; Briend, Jean-Yves; Hagel, Gaetan; Boulc'h, Florence – Journal of Chemical Education, 2015
In this article, we present two concrete applications of the concept of the human element to chemistry education; starting with a course and experimental project on blue pigment synthesis and concluding with cross-disciplinary lessons and experiments on blue photography. In addition to the description of the content of these courses, we explore…
Descriptors: Science Instruction, Chemistry, College Science, Undergraduate Study
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Knutson, Theodore R.; Knutson, Cassandra M.; Mozzetti, Abbie R.; Campos, Antonio R.; Haynes, Christy L.; Penn, R. Lee – Journal of Chemical Education, 2015
Chemical kinetic experiments to determine rate laws are common in high school and college chemistry courses. For reactions involving a color change, rate laws can be determined experimentally using spectrophotometric or colorimetric equipment though this equipment can be cost prohibitive. Previous work demonstrated that inexpensive handheld camera…
Descriptors: Handheld Devices, Photography, Kinetics, Chemistry
Vu D. Nguyen; Kurt R. Birdwhistell – Journal of Chemical Education, 2014
An update to the thermochromic cobalt(II) chloride equilibrium demonstration is described. Filter paper that has been saturated with aqueous cobalt(II) chloride is heated for seconds in a microwave oven, producing a color change. The resulting pink and blue map is used to colorfully demonstrate Le Châtelier's principle and to illuminate the hot…
Descriptors: Science Instruction, Chemistry, Color, Thermodynamics
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Campbell, Dean J.; Bosma, Wayne B.; Bannon, Stephen J.; Gunter, Molly M.; Hammar, Margaret K. – Journal of Chemical Education, 2012
FriXion erasable pens contain thermochromic inks that have colored low-temperature forms and colorless high-temperature forms. Liquid nitrogen can be used to kinetically trap the high-temperature forms of the ink at temperatures at which ordinarily the low-temperature forms are more thermodynamically stable. (Contains 2 figures.)
Descriptors: Chemistry, Thermodynamics, Science Instruction, Scientific Principles
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Dabke, Rajeev B.; Gebeyehu, Zewdu; Thor, Ryan – Journal of Chemical Education, 2011
An undergraduate experiment on coulometric analysis of four commercial household products is presented. A special type of coulometry cell made of polydimethylsiloxane (PDMS) polymer is utilized. The PDMS cell consists of multiple analyte compartments and an internal network of salt bridges. Experimental procedure for the analysis of the acid in a…
Descriptors: Chemistry, College Science, Undergraduate Study, Science Experiments
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Cui, Ai-Li; Chen, Xi; Sun, Long; Wei, Jing-Zhi; Yang, Jin; Kou, Hui-Zhong – Journal of Chemical Education, 2011
The synthesis and characterization of two copper(II) complexes, [Cu(deen)[subscript 2]](BF4)[subscript 2] and [Cu(deen)[subscript 2]](NO[subscript 3])[subscript 2] (deen = N,N-diethylethylenediamine), that show interesting thermochromic properties, are described. The subtle alternation of coordination geometry around Cu(II) is responsible for the…
Descriptors: Chemistry, Science Instruction, Color, Science Experiments
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Suhr, Wilfried; Schlichting, H. Joachim – European Journal of Physics, 2011
A sticky capture thread from the spiral element of spider orb-webs is formed of almost regularly spaced droplets that surround a supporting axial fibre. From the perspective of physical optics it represents a periodic linear array of scattering elements that acts as a diffraction grating. This is a novel aspect, which is of vital importance for…
Descriptors: Optics, Color, Physics, Scientific Principles
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Vannatta, Michael W.; Richards-Babb, Michelle; Sweeney, Robert J. – Journal of Chemical Education, 2010
Metal oxalate synthesis and pyrolysis provides an opportunity for students to (i) learn stoichiometry, (ii) experience the consequences of proper stoichiometric calculations and experimental techniques, and (iii) be introduced to the relevance of chemistry by highlighting oxalates in context, for example, usages and health effects. At our…
Descriptors: Stoichiometry, Chemistry, Science Instruction, Metallurgy
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Heumann, Lars V. – Journal of Chemical Education, 2008
A classroom demonstration detailing the procedure for the separation of a ternary mixture consisting of intensely colored compounds using silica gel column chromatography is described. The audience can follow the compounds during their passage through the column as individual, colored bands while learning about different tools and techniques used…
Descriptors: Demonstrations (Educational), Chemistry, Teaching Methods, Science Experiments
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Devons, Samuel – 1976
Information related to the history of optics with emphasis on the classical and medieval periods is presented. Notes are included on experiments dealing with refraction at a plane interface between two media; refraction by transparent spheres; light, color, and reflection by transparent spheres. (Author/SA)
Descriptors: College Science, Color, Higher Education, Light
Devons, Samuel – 1975
The life and work of Isaac Newton and his investigations of light and color are described in detail. Notes include preliminary observations of chromatic dispersion; dispersion by an equilateral prism; the "Experimentum Crucos" or the composite nature of white light; the nature of colored light and illumination; transmissions and…
Descriptors: Biographies, College Science, Color, Higher Education