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Conductivity Study of DTAB in Water and Ethanol-Water Mixture in the Presence and Absence of ZnSO4

Majallat Baghdād lil-ʻulūm, 2020-12, Vol.17 (4), p.1207

ISSN: 2078-8665 ;EISSN: 2411-7986 ;DOI: 10.21123/bsj.2020.17.4.1207

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  • Title:
    Conductivity Study of DTAB in Water and Ethanol-Water Mixture in the Presence and Absence of ZnSO4
  • Author: Acharya, Sangita ; Niraula, Tulasi ; Bhattarai, Ajaya
  • Subjects: DTAB, Ethanol-water, Solvent parameters, Solvophobic parameter, ZnSO4
  • Is Part Of: Majallat Baghdād lil-ʻulūm, 2020-12, Vol.17 (4), p.1207
  • Description: The physicochemical behaviour of dodecyltrimethylammonium bromide (DTAB) in water and ethanol-water mixture in the presence and absence of ZnSO4 were studied by measuring the conductivity at 298.15 K. The pre-micellar (S1) and post-micellar slopes (S2) were obtained and calculated the degree of dissociation (α) and the critical micelle concentration (cmc). With an increase in ethanol content, the cmc and α of DTAB increased whereas, in the presence of ZnSO4, the cmc and α decreased. By using cmc and α, thermodynamic properties as the standard free energy of micellization ( ) were evaluated. With an increase in ethanol content, the negative values of  are decreased indicating less spontaneous in the micellization which makes micellization less favourable. The correlation of the pre-micellar and post-micellar slopes with the volume fraction of ethanol were discussed. DTAB micellization was tested in contexts of specific solvent parameters and solvophobic parameter.
  • Publisher: College of Science for Women, University of Baghdad
  • Language: English;Arabic
  • Identifier: ISSN: 2078-8665
    EISSN: 2411-7986
    DOI: 10.21123/bsj.2020.17.4.1207
  • Source: ROAD: Directory of Open Access Scholarly Resources
    DOAJ Directory of Open Access Journals
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