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Constant-Current Coulometric Titration of Hydrochloric Acid
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Abstract
The titration of a strong acid with a strong base and the electrolysis of water are two classic laboratory exercises that are either performed or demonstrated in secondary school classrooms in order to introduce two important areas of chemsitry: acid-base chemistry and electrochemistry. In this experiment we have combined these two classical experiments into one complete laboratory experience. Here we report how the elctrolysis of an aqueous solution can be used to determine the concentration of hydrochloric acid in a coulometric titration.
Keywords (Audience):
First-Year Undergraduate / GeneralKeywords (Domain):
Laboratory InstructionKeywords (Pedagogy):
Hands-On Learning / ManipulativesKeywords (Subject):
Titration / Volumetric AnalysisCiting Articles
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This article has been cited by 5 ACS Journal articles (5 most recent appear below).
Coulometric Analysis Experiment for the Undergraduate Chemistry Laboratory
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Simple and Automated Coulometric Titration of Acid Using Nonisolated Electrodes
Thomas S. Kuntzleman, Joshua B. Kenney, Scott Hasbrouck, Michael J. Collins, and John R. AmendJournal of Chemical Education2011 88 (11), 1565-1568Simple and Automated Coulometric Titration of Acid Using Nonisolated Electrodes
Thomas S. Kuntzleman, Joshua B. Kenney, Scott Hasbrouck, Michael J. Collins, and John R. AmendJournal of Chemical Education2011 88 (11), 1565-1568Coulometric titrations involve the quantification of analyte by measurements of current and time. In most coulometric titrations, the anode and cathode are placed in isolated cells that are connected by a salt bridge. By contrast, the experiments ...
Coulometric Titration of Ethylenediaminetetraacetate (EDTA) with Spectrophotometric Endpoint Detection: An Experiment for the Instrumental Analysis Laboratory
Kathryn R. Williams, Vaneica Y. Young, and Benjamin J. KillianJournal of Chemical Education2011 88 (3), 315-316Coulometric Titration of Ethylenediaminetetraacetate (EDTA) with Spectrophotometric Endpoint Detection: An Experiment for the Instrumental Analysis Laboratory
Kathryn R. Williams, Vaneica Y. Young, and Benjamin J. KillianJournal of Chemical Education2011 88 (3), 315-316Ethylenediaminetetraacetate (EDTA) is commonly used as an anticoagulant in blood-collection procedures. In this experiment for the instrumental analysis laboratory, students determine the quantity of EDTA in commercial collection tubes by coulometric ...
Conductimetric Titrations: A Predict−Observe−Explain Activity for General Chemistry
K. Christopher Smith, Etinosa Edionwe, and Bayyinah MichelJournal of Chemical Education2010 87 (11), 1217-1221Conductimetric Titrations: A Predict−Observe−Explain Activity for General Chemistry
K. Christopher Smith, Etinosa Edionwe, and Bayyinah MichelJournal of Chemical Education2010 87 (11), 1217-1221A 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 ...
A Variety of Electrochemical Methods in a Coulometric Titration Experiment
Albert LotzJournal of Chemical Education1998 75 (6), 775A Variety of Electrochemical Methods in a Coulometric Titration Experiment
Albert LotzJournal of Chemical Education1998 75 (6), 775An experiment for a practical course is described in which the amounts of HCl and KI in a mixture of standardized solutions are determined by three coulometric titrations. The iodide content is titrated with bromine that is generated at the anode from ...
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- Received: August 03, 2009
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