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Halting the Briggs-Rauscher Oscillating Reaction The Briggs-Rauscher reaction is demonstrated in three different ways. Catalase from a liver extract decomposes the hydrogen peroxide in an Briggs-Rauscher reaction, stopping the oscillations.
Catalysis |
Kinetics |
Enzymes |
Proteins / Peptides
Induction by Iron(II) of the Oxidation of Iodide by Dichromate Acidic aqueous solutions containing dichromate and iodide ions are mixed with no reaction. The addition of a solution of iron(II) ion induces the rapid formation of brown triiodide ion.
Catalytic converters are used in automobiles to convert pollutants in engine emissions to benign products. Catalytic converters in today's automobiles are made of a porous ceramic brick that has been coated with catalysts, additives, stabilizers, and support materials. Corning has developed bricks that have very thin-walled channels with 600 channels per square inch. Which of the following research goals did they target?
Kinetics |
Catalysis
Kinetics : ConcVsTimeGraph (8 Variations)
The following graph shows the change in concentration as a function of time for the reaction:
2NO2(g) + F2(g) 2NO2F(g)
What do each of the curves A, B, and C represent?
Organometallic Chemistry: Development and Study of Catalytic ActivityCaroline R. Pharr and Shannon Stahl This Today's Science for Tomorrow's Scientists (TSTS) tutorial introduces current scientific research on the development and investigation of new catalysts for the selective oxidation of organic substances by molecular oxygen. Pharr, Caroline R.; Stahl, Shannon. J. Chem. Educ.2008, 85, 1453.
Catalysis |
Oxidation / Reduction |
Periodicity / Periodic Table |
Physical Properties |
Synthesis |
Transition Elements
An Iodine Fluorescence Quenching Clock ReactionRichard B. Weinberg Describes a fluorescent clock reaction based on the principles of the Landolt iodine reaction but using the potent fluorescence quenching properties of triiodide to abruptly extinguish the ultraviolet fluorescence of optical brighteners present in liquid laundry detergents. Weinberg, Richard B. J. Chem. Educ.2007, 84, 797.
Acids / Bases |
Consumer Chemistry |
Dyes / Pigments |
Kinetics |
Oxidation / Reduction |
pH |
Photochemistry |
Rate Law |
Vitamins
The Ultrasonic Soda Fountain: A Dramatic Demonstration of Gas Solubility in Aqueous SolutionsJohn E. Baur and Melinda B. Baur An ultrasonic bath is used to accelerate the rate at which carbonated beverages equilibrate with the atmosphere. The resulting fountain, which can reach heights in excess of 3 meters, is a dramatic demonstration of the solubility of gases in liquids. Baur, John E.; Baur, Melinda B. J. Chem. Educ.2006, 83, 577.
The Rate of ReactionEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Catalysis |
Kinetics
Mechanism-Based Kinetics SimulatorRobert M. Hanson Simulate the kinetics of a reaction based on its mechanism using JavaScript. The idea is to write a mechanism and, based on that, follow the course of concentrations or rates of change in concentration of reactants, catalysts, intermediates, and products over time.
Kinetics |
Catalysis |
Mechanisms of Reactions
Connected ChemistryMike Stieff Connected Chemistry, a novel learning environment for teaching chemistry, is appropriate for use in both high school and undergraduate chemistry classrooms. Connected Chemistry comprises several molecular simulations designed to enable instructors to teach chemistry using the perspective of emergent phenomena. That is, it allows students to see observed macro-level chemical phenomena, like many other scientific phenomena, as resultant from the interactions of many individual agents on a micro-level. This perspective is especially appropriate to the study of chemistry where the interactions between multitudes of molecules on the atomic level give rise to the macro-level concepts that students study in the classroom. Connected Chemistry comprises molecular simulations embedded in the NetLogo modeling software (1). The collection contains several predesigned simulations of closed chemical systems to teach specific chemistry concepts. Currently, Connected Chemistry contains models for teaching Brønsted Lowry acid base theory, enzyme kinetics, radical polymerization, buffer chemistry, kinetics, chemical equilibrium, and crystallization. Instructors and students can individually tailor the predesigned simulations or generate new simulations as they are needed in the context of a particular lesson, classroom, or department.
2NO2F(g)
