Thermodynamics of the unsymmetrical mixed electrolyte HCl-NiCl2. Application of Pitzer's equations

Rabindra N. Roy, Lakshmi N. Roy, Greg D. Farwell, Kristy A. Smith, Frank J. Millero

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13 Scopus citations

Abstract

Emf measurements were performed on solutions at temperatures from 278.15 to 318.15 K and at eight different ionic strengths from 0.1 to 3.0 mol kg-1, by using a Harned's emf cell without liquid junction of the type Pt;H2(g, 1 atm)|HCl(m1),-NiCl2(m2)|AgCl{A}. From these measurements, the Pitzer mixing coefficients SθH,Ni and ψH,Ni,Cl as well as linear representation of temperature derivatives δSθH,Ni/δT and δψH,Ni,Cl/δT have been determined. The results are interpreted in terms of simple Harned's rule and Pitzer's formalism for mixed electrolyte solutions. The activity coefficients at ionic strength fraction y of NiCl2 at 298.15 are given.

Original languageEnglish (US)
Pages (from-to)7321-7325
Number of pages5
JournalJournal of physical chemistry
Volume94
Issue number18
StatePublished - Dec 1 1990

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

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    Roy, R. N., Roy, L. N., Farwell, G. D., Smith, K. A., & Millero, F. J. (1990). Thermodynamics of the unsymmetrical mixed electrolyte HCl-NiCl2. Application of Pitzer's equations. Journal of physical chemistry, 94(18), 7321-7325.