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The Chemical Educator

ISSN: 1430-4171 (electronic version)

Table of Contents

Abstract Volume 19 (2014) pp 217-222

Some Examples of Redox Back Titrations

Tadeusz Michałowski*, Agustin Garcia Asuero, Maja Ponikvar-Svet§, Anna Maria Michałowska-Kaczmarczyk**, Sławomir Wybraniec

Faculty of Engineering and Chemical Technology, Technical University of Cracow, 31-155 Cracow, Poland, michalot@o2.pl;Department of Analytical Chemistry, The University of Seville, 41012 Seville, Spain; §Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; **Department of Oncology, The University Hospital in Cracow, 31-501 Cracow, Poland
Received March 10, 2014. Accepted May 13, 2014

Published: 27 June 2014

Abstract. This article refers to calculations involved with determination of ethanol and phenol, analyzed according to redox back titration principle. A quantitative reasoning, based on logical sequence of statements, is presented for derivation of the formulas required to calculate the results of chemical analyses. Students can gain an insight into a classical redox titration and get a knowledge on the advantages of back titration. The derivation of the equations is a good exercise for students that may be carried out during a course of quantitative chemical analysis. In this case, the analytical methods might also be included as a part of the laboratory trainings.

Key Words: In the Classroom; quantitative chemical analysis

(*) Corresponding author. (E-mail: michalot@o2.pl)

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