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Preparation and Analysis of Libethenite: A Project for the First-Year Laboratory

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Kelly E. Ginion and Claude H. Yoder

Department of Chemistry, Franklin and Marshall College, Lancaster, PA 17604-3003

J. Chem. Educ., 2004, 81 (3), p 394

DOI: 10.1021/ed081p394

Publication Date (Web): March 1, 2004

Section:

History, Education, and Documentation

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.

Keywords (Audience):

First-Year Undergraduate / General

Keywords (Domain):

Laboratory Instruction

Keywords (Pedagogy):

Inquiry-Based / Discovery Learning

Keywords (Subject):

Copper

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This article has been cited by 2 ACS Journal articles (2 most recent appear below).

The Synthesis and Characterization of Rouaite, a Copper Hydroxy Nitrate. An Integrated First-Year Laboratory Project
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Journal of Chemical Education2009 86 (1), 80
- The Synthesis and Characterization of Rouaite, a Copper Hydroxy Nitrate. An Integrated First-Year Laboratory Project
  Elizabeth J. Bushong and Claude H. Yoder
  Journal of Chemical Education2009 86 (1), 80
  The synthesis and analysis of a copper hydroxy nitrate provides an exposure to a simple ionic synthesis, qualitative analysis of copper and nitrate, two gravimetric analyses (copper and nitrate), one volumetric analysis (hydroxide), and a colorimetric ...
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An Azulene-Based Discovery Experiment: Challenging Students To Watch for the "False Assumption"
Charles M. Garner
Journal of Chemical Education2005 82 (11), 1686
- An Azulene-Based Discovery Experiment: Challenging Students To Watch for the "False Assumption"
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  Journal of Chemical Education2005 82 (11), 1686
  A discovery-based organic laboratory experiment designed to challenge student's assumptions is described. The students are first taught that the trifluoroacylation of azulene followed by treatment with hydroxide yields azulene-1-carboxylic acid, then are ...
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