Cyclic Voltammetry of Hexachloroiridate(IV): An Alternative to the Electrochemical Study of the Ferricyanide Ion

TCE

The Chemical Educator

ISSN: 1430-4171 (electronic version)

Table of Contents

Abstract Volume 5 Issue 5 (2000) pp 231-235

Cyclic Voltammetry of Hexachloroiridate(IV): An Alternative to the Electrochemical Study of the Ferricyanide Ion

Steven Petrovic

Department of Chemistry, Southern Oregon University, Ashland, OR 97520

Published online: 2 October 2000

Abstract. An instrumental analysis experiment on the cyclic voltammetry of hexachloroiridate(IV) is described in this paper. The hexachloroiridate(IV)/hexachloroiridate(III) redox couple allows the analytical chemistry student to study the behavior of electrochemically reversible electron transfer with no complications. The cyclic voltammetric response of hexachloroiridate(IV)/hexachloroiridate(III) is compared with the ferricyanide/ ferrocyanide redox couple, which has been known to exhibit quasireversible electron transfer as a result of film formation on the electrode surface. Considerations regarding the stability of the hexachloroiridate(IV) ion in 0.1 M KNO₃ are also addressed.

Key Words: Laboratories and Demonstrations; instrumental analysis

(*) Corresponding author. (E-mail: Petrovis@sou.edu)

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Student Laboratory Handout (147 KB) 10.1007/s00897000416b