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Potentiometric Determination of CO2 Concentration in the Gaseous Phase: Applications in Different Laboratory Activities

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Eduardo Cortón , Santiago Kocmur , Liliana Haim and Lydia Galagovsky

Centro de Formación en la Enseñanaza de las Ciencias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Cuidad Universitaria - Pabellón II, 1428 Buenos Aires, Argentina

J. Chem. Educ., 2000, 77 (9), p 1188

DOI: 10.1021/ed077p1188

Publication Date (Web): September 1, 2000

Section:

History, Education, and Documentation

Abstract

Four simple experiments are described, in two laboratory sessions of 3 hours each. They provide high school students of a combined science course with the opportunity to review and integrate many topics while participating in a hands-on activity that resembles real industrial problems. The first lab comprises the calibration of a CO₂ potentiometric detector with gas mixtures. The CO₂ and CO₂-free air required for the gaseous samples are produced in the lab by an inexpensive and simple apparatus. In the second lab, the CO₂ potentiometric device is used to measure CO₂uptake and release during different metabolic processes. The variation of CO₂ production will be also estimated while changing the air/fuel proportion in a Bunsen burner.

Keywords (Audience):

High School / Introductory Chemistry

Keywords (Domain):

Analytical Chemistry

Keywords (Feature):

Secondary School Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Electrochemistry

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This article has been cited by 1 ACS Journal articles (1 most recent appear below).

A Nonradioactive Simulation of the Viking Mission Labeled-Release Experiment: A Search for Evidence of Life
Lydia Galagovsky , Santiago Kocmur and Guillermo J. Visbeek , Liliana Haim , Eduardo Cortón
Journal of Chemical Education2002 79 (9), 1105
- A Nonradioactive Simulation of the Viking Mission Labeled-Release Experiment: A Search for Evidence of Life
  Lydia Galagovsky , Santiago Kocmur and Guillermo J. Visbeek , Liliana Haim , Eduardo Cortón
  Journal of Chemical Education2002 79 (9), 1105
  How does one distinguish life from nonlife? This hands-on activity reproduces the life-test experiments carried out by the Viking Mars missions by simple nonradioactive laboratory experiments. A CO2 potentiometric electrode is used to measure the carbon ...
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