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Indirect Potentiometric Titration of Fe(III) with Ce(IV) by Gran's Method

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Maria da Conceição Silva Barreto , Luciana de Lucena Medeiros and Paulo César de Holanda Furtado

Departamento de Química - CCEN, Universidade Federal da Paraiba, 58051-970 João Pessoa, PB, Brazil

J. Chem. Educ., 2001, 78 (1), p 91

DOI: 10.1021/ed078p91

Publication Date (Web): January 1, 2001

Abstract

The indirect titration of Fe(III) ion with oxidizing agent is a good example of the application of Gran's method to a redox reaction because the Gran curve doesn't present linearity deviations as other redox systems do. It seems as if previous stages of reduction and rinsing of the reducing column leave the solution to be titrated with a high ionic strength, which does not vary considerably during the titration.

Keywords (Domain):

Analytical Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Electrochemistry

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

Complexation Effect on Redox Potential of Iron(III)−Iron(II) Couple: A Simple Potentiometric Experiment
Masood Ahmad Rizvi, Raashid Maqsood Syed, and Badruddin Khan
Journal of Chemical Education2011 88 (2), 220-222
- Complexation Effect on Redox Potential of Iron(III)−Iron(II) Couple: A Simple Potentiometric Experiment
  Masood Ahmad Rizvi, Raashid Maqsood Syed, and Badruddin Khan
  Journal of Chemical Education2011 88 (2), 220-222
  A titration curve with multiple inflection points results when a mixture of two or more reducing agents with sufficiently different reduction potentials are titrated. In this experiment iron(II) complexes are combined into a mixture of reducing agents and ...
  Abstract | Full Text HTML | Hi-Res PDF | PDF w/ Links
Conductimetric Titrations: A Predict−Observe−Explain Activity for General Chemistry
K. Christopher Smith, Etinosa Edionwe, and Bayyinah Michel
Journal of Chemical Education2010 87 (11), 1217-1221
- Conductimetric Titrations: A Predict−Observe−Explain Activity for General Chemistry
  K. Christopher Smith, Etinosa Edionwe, and Bayyinah Michel
  Journal of Chemical Education2010 87 (11), 1217-1221
  A predict−observe−explain framework is used to explore conductimetric titrations of a hydrochloric acid−sodium hydroxide (strong acid−strong base) and an acetic acid−sodium hydroxide (weak acid−strong base) system in which all components are soluble. In ...
  Abstract | Full Text HTML | Hi-Res PDF | PDF w/ Links