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  Home > JCE Print > Journal of Chemical Education > Issues > 2005  > February  >
In the Laboratory
Analysis of Natural Buffer Systems and the Impact of Acid Rain. An Environmental Project for First-Year Chemistry Students
David C. Powers, Andrew T. Higgs, Matt L. Obley, Phyllis A. Leber, Kenneth R. Hess, and Claude H. Yoder
Department of Chemistry, Franklin and Marshall College, Lancaster, PA 17604
Cover
February 2005
Vol. 82 No. 2
p. 274
Abstract
The purpose of this project is to investigate the basic principles involved in acid–base buffer systems within the context of an environmental issue. It is designed for use in an introductory chemistry course. The students will learn about acid–base interactions and examine how a buffer system composed of a weak acid and its conjugate base can neutralize large quantities of strong acid while resisting drastic change in the pH of the system. Students will also analyze experimentally the various components of the most commonly occurring natural buffer system. The results of these experiments can be discussed with regard to the impact that acid rain has on water bodies of different buffer capacities and the variables that control the buffer capacity of individual bodies of water.
Supplement
Instructions for the students and notes for the instructor are available.
*  Contents JCE2005p0274W.doc (Microsoft Word)
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*  Citation
 Powers, David C.; Higgs, Andrew T.; Obley, Matt L.; Leber, Phyllis A.; Hess, Kenneth R.; Yoder, Claude H. J. Chem. Educ. 2005 82 274.
*  Keywords
 Acid–Base Chemistry; Aqueous Solution Chemistry; Environmental Chemistry; Equilibrium; General Chemistry
*  History
 Created:
Last Updated:		 January 4, 2005
January 14, 2005
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