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A Kinetics Experiment To Demonstrate the Role of a Catalyst in a Chemical Reaction: A Versatile Exercise for General or Physical Chemistry Students
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Abstract
A kinetics experiment for general or physical chemistry students is presented. The common iodine clock reaction is modified and the initial rate method is used to observe the role of catalyst in the reactions through activation energy calculations. An experimental procedure is designed such that students can determine the order with respect to each reactant and evaluate the mechanism that has been previously reported for this reaction. Furthermore, students use experimental results to calculate the rate constants of the uncatalyzed and catalyzed (independent of the uncatalyzed) reactions.
Keywords (Audience):
First-Year Undergraduate / GeneralKeywords (Domain):
Laboratory InstructionKeywords (Pedagogy):
Hands-On Learning / ManipulativesKeywords (Subject):
CatalysisCiting Articles
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This article has been cited by 6 ACS Journal articles (5 most recent appear below).
The Effect of Temperature and Ionic Strength on the Oxidation of Iodide by Iron(III): A Clock Reaction Kinetic Study
Jurica Bauer, Vladislav Tomišić, and Petar B. A. VrkljanJournal of Chemical Education2012 89 (4), 540-544The Effect of Temperature and Ionic Strength on the Oxidation of Iodide by Iron(III): A Clock Reaction Kinetic Study
Jurica Bauer, Vladislav Tomišić, and Petar B. A. VrkljanJournal of Chemical Education2012 89 (4), 540-544A laboratory exercise has recently been reported in which the students use the initial rates method based on the clock reaction approach to deduce the rate law and propose a reaction mechanism for the oxidation of iodide by iron(III) ions. The same ...
A Microscale Approach to Chemical Kinetics in the General Chemistry Laboratory: The Potassium Iodide Hydrogen Peroxide Iodine-Clock Reaction
Prem D. SattsangiJournal of Chemical Education2011 88 (2), 184-188A Microscale Approach to Chemical Kinetics in the General Chemistry Laboratory: The Potassium Iodide Hydrogen Peroxide Iodine-Clock Reaction
Prem D. SattsangiJournal of Chemical Education2011 88 (2), 184-188A microscale laboratory for teaching chemical kinetics utilizing the iodine clock reaction is described. Plastic pipets, 3 mL volume, are used to store and deliver precise drops of reagents and the reaction is run in a 24 well plastic tray using a total ...
Kinetics and Mechanism of Iodide Oxidation by Iron(III): A Clock Reaction Approach
Petar B. A. Vrkljan , Jurica Bauer and Vladislav TomisicJournal of Chemical Education2008 85 (8), 1123Kinetics and Mechanism of Iodide Oxidation by Iron(III): A Clock Reaction Approach
Petar B. A. Vrkljan , Jurica Bauer and Vladislav TomisicJournal of Chemical Education2008 85 (8), 1123A 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 ...
Modern Developments in the Physical Chemistry Laboratory
Samuel A. Abrash2007 973 (), 115-151Modern Developments in the Physical Chemistry Laboratory
Samuel A. Abrash2007 973 (), 115-151Developments in the physical chemistry laboratory since the publication of the germinal text by Schwenz and Moore (1) are categorized and reviewed. The categories examined include modern instrumentation, current topics in chemistry, integrated ...
A Student Laboratory Experiment Based on the Vitamin C Clock Reaction
Ed VitzJournal of Chemical Education2007 84 (7), 1156A Student Laboratory Experiment Based on the Vitamin C Clock Reaction
Ed VitzJournal of Chemical Education2007 84 (7), 1156We have adapted the vitamin C clock reaction to a student laboratory experiment in which the orders with respect to peroxide and iodide, the rate constant, and the activation energy are determined by the method of initial rates. Rates of the oxidation of ...
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- Received: August 03, 2009
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