Using a Combination of Experimental and Mathematical Method To Explore Critical Micelle Concentration of a Cationic Surfactant

An undergraduate electrical conductivity measurement experiment in a physical chemistry lab and basic fitting procedures are presented that allow a characterization of micellar system of hexadecyltrimethylammonium bromide (cetyltrimethylammonium bromide, CTAB) in binary mixture of water and acetonit...

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Bibliographic Details
Published in:Journal of chemical education 2016-07, Vol.93 (7), p.1277-1281
Main Authors: Goronja, Jelena, Pejić, Nataša, Janošević Ležaić, Aleksandra, Stanisavljev, Dragomir, Malenović, Anđelija
Format: Article
Language:English
Subjects:
Acetonitrile
Cetyltrimethylammonium bromide
Chemistry
College Science
Computation
Conductivity
Data acquisition
Electrical resistivity
Electronics
Experiments
Foreign Countries
Laboratory Experiments
Mathematics
Measurement
Micelles
Organic chemistry
Physical chemistry
Physics
Science Experiments
Serbia
Software
Surfactants
Undergraduate Students
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Summary:An undergraduate electrical conductivity measurement experiment in a physical chemistry lab and basic fitting procedures are presented that allow a characterization of micellar system of hexadecyltrimethylammonium bromide (cetyltrimethylammonium bromide, CTAB) in binary mixture of water and acetonitrile (ACN) as a cosolvent (10%, v/v) at 30.0 °C. Conductivity–concentration data were processed by inbuilt function of ORIGIN software to attain the values of critical micelle concentration by method of integration. Acquiring the data-fitting skills that are developed through the addition of a computational tool to a conventional electrical conductometry experiment has a general significance for its applications to more complex upper-level experiments with the aim to process data and perform fast calculations and graphics.
ISSN:0021-9584
1938-1328
DOI:10.1021/acs.jchemed.5b00913