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  Home > JCE Print > Journal of Chemical Education > Issues > 2008  > August  >
In the Laboratory
Data Pooling in a Chemical Kinetics Experiment: The Aquation of a Series of Cobalt(III) Complexes
A Discovery Chemistry Experiment
Richard S. Herrick and Kenneth V. Mills
Department of Chemistry, College of the Holy Cross, Worcester, MA 01610

Lisa P. Nestor
Department of Chemistry, Trinity College, Hartford, CT 06106

Cover
August 2008
Vol. 85 No. 8
p. 1120

Abstract
An experiment in chemical kinetics as part of our Discovery Chemistry curriculum is described. Discovery Chemistry is a pedagogical philosophy that makes the laboratory the key center of learning for students in their first two years of undergraduate instruction. Questions are posed in the pre-laboratory discussion and assessed using pooled student data. Results of experiments are then used in lecture to discover chemical principles. This experiment introduces students to integrated rate laws, the search for a mechanism that is consistent with chemical and kinetic data, and the concept of activation barriers and their measurement.
Supplement
Student handouts including notebook questions; Instructor notes including the details of the syntheses of the cobalt complexes
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Contents
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Citation
Herrick, Richard S.; Mills, Kenneth V.; Nestor, Lisa P. J. Chem. Educ. 2008, 85, 1120.
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Keywords
Cobalt; Coordination Compounds; First-Year Undergraduate / General; Hands-On Learning / Manipulatives; Inorganic Chemistry; Inquiry-Based / Discovery Learning; Kinetics; Laboratory Instruction; Mechanisms of Reactions; Physical Chemistry; Rate Law; Second-Year Undergraduate; UV-Vis Spectroscopy
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History
Created:
Last Updated:
6/23/2008
7/2/2008
 Caution! 
Experiments, laboratory exercises, lecture demonstrations, and other descriptions of the use of chemicals, apparatus, instruments, computers, and computer interfaces are presented in the Journal of Chemical Education as illustrative of new or improved ideas or concepts in chemistry instruction and are directed at qualified teachers. Although every effort is made to assure and encourage safe practices and safe use of chemicals, the Journal of Chemical Education cannot assume responsibility for uses made of its published materials. Many chemicals are hazardous. Precautions for the safe use of hazardous chemicals and directions for their proper disposal are described in the Material Safety Data Sheets and on the labels. We strongly urge all those planning to use materials from our pages to make choices and to develop procedures for laboratory and classroom safety in accordance with local needs and situations.
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