For the iodine clock reaction shown on the cover, a solution of hydrogen peroxide and sulfuric acid is added to a solution of iodide ion, thiosulfate ion, and starch. A slow reaction forms triiodide, which reacts rapidly with thiosulfate, until the thiosulfate is consumed.
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The excess triiodide then reacts with the starch to form a blue complex. Chemistry students are often introduced to the concept of reaction rates through demonstrations or laboratory activities involving this well-known reaction. With the necessary materials, expertise, and laboratory space readily available, an undergraduate iodine clock reaction experiment was modified to make it accessible to students in grade 9. See the article by Yuen-ying Carpenter, Heather A.
Phillips, and Michael B. Jakubinek, “Clock Reaction: Outreach Attraction” (DOI: 10.1021/ed100298e), for an example of how adapting undergraduate experiments offers researchers and educators a positive and efficient way to introduce younger students to a university chemistry laboratory. (Images from Chemistry Comes Alive!
3, JCE Software.).
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Arrigan 0 0 by Carl H. Hamann, Andrew Hamnet, Wolf Vielstich, Wiley-VCH, Weinheim, 2nd completely revised and updated edn, 2007, pp 550, ISBN 978-3-527-31069-2. Price: EUR 65.00, USD 95.00 - The subject of modern electrochemistry is a truly multi-disciplinary science which incorporates aspects of chemistry, physics and biology in descriptions of fundamental processes whilst impacting on health, environment, energy and process technologies in its varied applications. The fundamentals of charge transfer and charge storage have implications in diagnostics for early detection of disease, in energy harvesting and transformation and in the production of important materials. This book by three eminent electrochemists aims to provide a comprehensive yet concise coverage of modern electrochemistry. It achieves this aim very well in presenting the basics of the subject in easy-to-read chapters that contain useful references to further sources of information. This second edition is presented in ten chapters, dealing with Foundations, Definitions and Concepts (9 pages), Electrical Conductivity and Interionic Interactions (ca.
60 pages), Electrode Potentials and Double Layer Structure at Phase Boundaries (ca. 80 pages), Electrical Potentials and Electrical Current (ca. 90 pages), Methods for the Study of the Electrode/Electrolyte Interface (ca. 80 pages), Electrocatalysis and Reaction Mechanisms (ca. 40 pages), Solid and Molten-salt Ionic Conductors as Electrolytes (ca. 16 pages), Industrial Electrochemical Processes (ca.
40 pages), Galvanic Cells (ca. 40 pages) and Analytical Applications (ca. The text is certainly comprehensive in its coverage, ranging from ionic mobilities and liquid junction potentials, through redox electrochemistry of proteins and surface spectroscopy of electrocatalytic reactions, to fuel cells, batteries and gas sensors.
What is in this book for the reader of Chromatographia? Well, there is plenty of information here on the behaviour of ions in solution, the measurement of conductivities and the basis of electrokinetic separations.
Volker Amelung
There is plenty, too, on methods for the study of reactions at electrode surfaces, including voltametry in its various guises and amperometry, which can be used for detection in liquid chromatography. Although a few typographical errors were spotted, overall, the text is suitable for use in undergraduate or early graduate courses in electrochemistry as well as being suitable for those undertaking a self-guided study who want a comprehensive coverage of electrochemistry in one source.
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