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  Home > JCE Print > Journal of Chemical Education > Issues > 2004  > March  >
In the Laboratory
Preparation and Analysis of Libethenite: A Project for the First-Year Laboratory
Kelly E. Ginion and Claude H. Yoder
Department of Chemistry, Franklin and Marshall College, Lancaster, PA 17604-3003
Cover
March 2004
Vol. 81 No. 3
p. 394
Abstract
This first-year chemistry project involves the preparation and analysis of the naturally-occurring double salt Cu2PO4OH. The compound is prepared by addition of ammonium hydrogen phosphate to a solution of copper(II) sulfate. The percent copper is determined by colorimetric analysis of the ammine complex; the phosphate is determined by precipitation of lead(II) hydroxy phosphate. Students prepare (or are supplied with) a list of possible products and use the results of their analyses to determine which compound was actually prepared.
Supplement
Instructions for the students and notes for the instructor are available.
*  Contents JCE2004p0394W.doc (Microsoft Word)
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More Information
*  Citation
 Ginion, Kelly E.; Yoder, Claude H. J. Chem. Educ. 2004 81 394.
*  Keywords
 Copper; General Chemistry; Inquiry-Based / Discovery Method; Laboratory Instruction; Qualitative Analysis; Quantitative Analysis; UV-Vis Spectroscopy
*  History
 Created:
Last Updated:		 February 3, 2004
February 18, 2005
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