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

Rabindra N. Roy; Lakshmi N. Roy; D Gregory Farwell; Kristy A. Smith; Frank J. Millero

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

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

Research output: Contribution to journal › Article › peer-review

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 ^Sθ_H,Ni and ψ_H,Ni,Cl as well as linear representation of temperature derivatives δ^Sθ_H,Ni/δT and δψ_H,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 language	English (US)
Pages (from-to)	7321-7325
Number of pages	5
Journal	Journal of Physical Chemistry
Volume	94
Issue number	18
State	Published - 1990
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry

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@article{1194857178c44e47a2c8e55cf71e674f,

title = "Thermodynamics of the unsymmetrical mixed electrolyte HCl-NiCl2. Application of Pitzer's equations",

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.",

author = "Roy, {Rabindra N.} and Roy, {Lakshmi N.} and Farwell, {D Gregory} and Smith, {Kristy A.} and Millero, {Frank J.}",

year = "1990",

language = "English (US)",

volume = "94",

pages = "7321--7325",

journal = "Journal of Physical Chemistry",

issn = "0022-3654",

publisher = "American Chemical Society",

number = "18",

}

TY - JOUR

T1 - Thermodynamics of the unsymmetrical mixed electrolyte HCl-NiCl2. Application of Pitzer's equations

AU - Roy, Rabindra N.

AU - Roy, Lakshmi N.

AU - Farwell, D Gregory

AU - Smith, Kristy A.

AU - Millero, Frank J.

PY - 1990

Y1 - 1990

N2 - 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.

AB - 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.

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