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Showing 1 to 15 of 190 results Save | Export
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Kimberlin, Stephanie; Yezierski, Ellen – Journal of Chemical Education, 2016
Students' inaccurate ideas about what is represented by chemical equations and concepts underlying stoichiometry are well documented; however, there are few classroom-ready instructional solutions to help students build scientifically accurate ideas about these topics central to learning chemistry. An intervention (two inquiry-based activities)…
Descriptors: Stoichiometry, High School Students, Chemistry, Intervention
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Williamson, Vickie M.; Lane, Sarah M.; Gilbreath, Travis; Tasker, Roy; Ashkenazi, Guy; Williamson, Kenneth C.; Macfarlane, Ronald D. – Journal of Chemical Education, 2012
A prior study showed that students best make predictions about the outcome of opening a valve between two flasks containing a fluid or vacuum when they view both a demonstration video and a particulate animation, but the study showed no influence from the order in which these visualizations were used. The purpose of this current research was to…
Descriptors: Academic Ability, Chemistry, Animation, Video Technology
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Martin, Christopher B.; Schmidt, Monica; Soniat, Michael – Journal of Chemical Education, 2011
A survey was conducted of four-year institutions that teach undergraduate organic chemistry laboratories in the United States. The data include results from over 130 schools, describes the current practices at these institutions, and discusses the statistical results such as the scale of the laboratories performed, the chemical techniques applied,…
Descriptors: Organic Chemistry, Laboratory Equipment, Undergraduate Students, Science Education
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Autschbach, Jochen – Journal of Chemical Education, 2007
We investigate why the particle-in-a-box (PB) model works well for calculating the absorption wavelengths of cyanine dyes and why it does not work for conjugated polyenes. The PB model is immensely useful in the classroom, but owing to its highly approximate character there is little reason to expect that it can yield quantitative agreement with…
Descriptors: Chemistry, Undergraduate Study, Higher Education, Experiments
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Green, Brian; Bentley, Michael D.; Chung, Bong Y.; Lynch, Nicholas G.; Jensen, Bruce L. – Journal of Chemical Education, 2007
The triterpenes are a diverse class of widely distributed natural products derived from squalene. Various cyclization and subsequent rearrangement reactions produce many complex structural types. These compounds frequently display a wide divergence of biological properties. For example the pentacyclic triterpene, betulin, is isolated from white…
Descriptors: Organic Chemistry, Chemistry, Laboratory Experiments, Higher Education
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Qvit, Nir; Barda, Yaniv; Gilon, Chaim; Shalev, Deborah E. – Journal of Chemical Education, 2007
This laboratory experiment provides a unique opportunity for students to synthesize three analogues of aspartame, a commonly used artificial sweetener. The students are introduced to the powerful and useful method of parallel synthesis while synthesizing three dipeptides in parallel using solid-phase peptide synthesis (SPPS) and simultaneous…
Descriptors: Chemistry, Laboratory Experiments, Teaching Methods, Spectroscopy
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Greco, George E. – Journal of Chemical Education, 2007
An experiment for the upper-level undergraduate laboratory is described in which students synthesize a ruthenium olefin metathesis catalyst, then use the catalyst to carry out the ring-closing metathesis of diethyl diallylmalonate. The olefin metathesis reaction was the subject of the 2005 Nobel Prize in chemistry. The catalyst chosen for this…
Descriptors: Chemistry, Laboratories, Experiments, Undergraduate Students
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Pappenfus, Ted M.; Hermanson, David L.; Ekerholm, Daniel P.; Lilliquist, Stacie L.; Mekoli, Megan L. – Journal of Chemical Education, 2007
A series of experiments for undergraduate laboratory courses (e.g., inorganic, organometallic or advanced organic) have been developed. These experiments focus on understanding the design and catalytic activity of ruthenium-indenylidene complexes for olefin metathesis. Included in the experiments are the syntheses of two ruthenium-indenylidene…
Descriptors: Chemistry, Laboratory Experiments, Undergraduate Study, Higher Education
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Martin, Eric; Kellen-Yuen, Cynthia – Journal of Chemical Education, 2007
A greener, microwave-assisted Wittig reaction has been developed for the second-semester organic teaching laboratory. Utilizing this microwave technique, a variety of styrene derivatives have been successfully synthesized from aromatic aldehydes in good yields (41-68%). The reaction not only occurs under neat reaction conditions, but also employs…
Descriptors: Reaction Time, Laboratories, Undergraduate Study, Higher Education
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Coe, Benjamin J. – Journal of Chemical Education, 2004
An experiment for third-year undergraduate a student is designed which provides synthetic experience and qualitative interpretation of the spectroscopic properties of the ruthenium complexes. It involves the syntheses and characterization of several coordination complexes of ruthenium, the element found directly beneath iron in the middle of the…
Descriptors: Chemistry, Undergraduate Students, Laboratory Experiments, Higher Education
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Pursell, Christopher J.; Chandler, Bert; Bushey, Michelle M. – Journal of Chemical Education, 2004
Capillary electrophoresis is gradually working its way into the undergraduate laboratory curriculum. Typically, experiments utilizing this newer technology have been introduced into analytical or instrumental courses. The authors of this article have introduced an experiment into the introductory laboratory that utilizes capillary electrophoresis…
Descriptors: Biochemistry, Water, Science Experiments, Science Laboratories
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Laroche, Lyubov Hoffman; Wulfsberg, Gary; Young, Barbara – Journal of Chemical Education, 2003
Recommends using educational technology to present images of chemical reactions to students instead of doing time-consuming live demonstrations. Uses a VCR to show hazardous chemical reactions, give instructions to organize students into groups, think about data, draw conclusions, and design an experiment. Reports that the quality of learning from…
Descriptors: Chemical Reactions, Chemistry, Classroom Techniques, College Freshmen
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Phelps, Amy J.; Lee, Cherin – Journal of Chemical Education, 2003
Notes that beginning teachers mimic the teaching of their college instructors; however, not many of the strategies students observe and mimic are supported by recent reform efforts. Proposes that college and university science instructors must recognize their impact on science teacher education and adjust their strategies to be consistent with the…
Descriptors: College Faculty, Constructivism (Learning), Higher Education, Imitation
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Shibley, Ivan A., Jr.; Milakofsky, Louis; Bender, David S.; Patterson, Henry O. – Journal of Chemical Education, 2003
Investigates whether introductory college chemistry students today differ from those a generation ago in terms of Piagetian cognitive functioning, aptitude, and achievement, and whether the gender differences in Piagetian cognitive development functioning found in 1981 are still evident today. Suggests that today's students are different in a…
Descriptors: Chemistry, Cognitive Development, Curriculum Development, Followup Studies
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Smith, Bradley D.; Jacobs, Dennis C. – Journal of Chemical Education, 2003
Points out the important use of textbooks and their ancillary resources in lower-division chemistry courses and the scientific misconceptions found in them. Introduces the TextRev Project which is a new resource for data collection and analysis. Investigates how first and second year chemistry students use and value their textbooks and their study…
Descriptors: Chemistry, Evaluation Methods, Higher Education, Misconceptions
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