The Chemical Educator

, Volume 7, Issue 4, pp 211–213 | Cite as

Acid–Base Titration: Analysis of Phosphoric Acid Anodizing Solutions. A Problem-Based Learning Approach

Laboratories and Demonstrations
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Abstract

Phosphoric acid anodizing solutions are routinely titrated to monitor their concentrations; however, after successive anodizations of aluminum metal, increasing amounts of dissolved aluminum interfere with the neutralization titration. The true concentration of phosphoric acid is determined by a correction factor based on the concentration of the dissolved aluminum, which is determined industrially by flame atomic absorption spectrometry. The academic determination of a correction factor for aluminum as well as copper can be designed as a traditional or a problem-based learning exercise.

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Copyright information

© Springer-Verlag New York, Inc. 2002

Authors and Affiliations

  1. 1.Department of Chemistry and BiochemistryKennesaw State UniversityKennesaw

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