The pK1 * for the dissociation of H2S in various ionic media

J. Peter Hershey, Tinka Plese, Frank J Millero

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

The stoichiometric pK1 * for the dissociation of H2S has been determined from emf measurements in NaCl from 0.1 m to saturation at 5, 25 and 45°C and in KCl solutions at 5 and 25°C. The values of pK1 * were also measured in NaCl with small amounts of added MgCl2 and CaCl2 to I = 6.0 m at 25 °C. The results were used to determine Pitzer coefficients for the interactions of HS- ions with Na+, K+, Mg2+ and Ca2+. Values of the pK1 *, estimated using these coefficients, were found to be in excellent agreement with the measured values. Estimates of pK1 * in seawater and Dead Sea water calculated from the Pitzer coefficients were in excellent agreement with measured values from 5 to 25°C. Thus, it is possible to characterize the thermodynamics of the first dissociation of H2S in most natural waters from 0 to 50°C and I = 0 to 6 m.

Original languageEnglish (US)
Pages (from-to)2047-2051
Number of pages5
JournalGeochimica et Cosmochimica Acta
Volume52
Issue number8
DOIs
StatePublished - 1988

Fingerprint

seawater
Magnesium Chloride
Water
Seawater
thermodynamics
Thermodynamics
saturation
Ions
ion
Electric potential
water

ASJC Scopus subject areas

  • Geochemistry and Petrology

Cite this

The pK1 * for the dissociation of H2S in various ionic media. / Hershey, J. Peter; Plese, Tinka; Millero, Frank J.

In: Geochimica et Cosmochimica Acta, Vol. 52, No. 8, 1988, p. 2047-2051.

Research output: Contribution to journalArticle

Hershey, J. Peter ; Plese, Tinka ; Millero, Frank J. / The pK1 * for the dissociation of H2S in various ionic media. In: Geochimica et Cosmochimica Acta. 1988 ; Vol. 52, No. 8. pp. 2047-2051.
@article{195b3b098abf4057a00e17f496671e22,
title = "The pK1 * for the dissociation of H2S in various ionic media",
abstract = "The stoichiometric pK1 * for the dissociation of H2S has been determined from emf measurements in NaCl from 0.1 m to saturation at 5, 25 and 45°C and in KCl solutions at 5 and 25°C. The values of pK1 * were also measured in NaCl with small amounts of added MgCl2 and CaCl2 to I = 6.0 m at 25 °C. The results were used to determine Pitzer coefficients for the interactions of HS- ions with Na+, K+, Mg2+ and Ca2+. Values of the pK1 *, estimated using these coefficients, were found to be in excellent agreement with the measured values. Estimates of pK1 * in seawater and Dead Sea water calculated from the Pitzer coefficients were in excellent agreement with measured values from 5 to 25°C. Thus, it is possible to characterize the thermodynamics of the first dissociation of H2S in most natural waters from 0 to 50°C and I = 0 to 6 m.",
author = "Hershey, {J. Peter} and Tinka Plese and Millero, {Frank J}",
year = "1988",
doi = "10.1016/0016-7037(88)90183-4",
language = "English (US)",
volume = "52",
pages = "2047--2051",
journal = "Geochmica et Cosmochimica Acta",
issn = "0016-7037",
publisher = "Elsevier Limited",
number = "8",

}

TY - JOUR

T1 - The pK1 * for the dissociation of H2S in various ionic media

AU - Hershey, J. Peter

AU - Plese, Tinka

AU - Millero, Frank J

PY - 1988

Y1 - 1988

N2 - The stoichiometric pK1 * for the dissociation of H2S has been determined from emf measurements in NaCl from 0.1 m to saturation at 5, 25 and 45°C and in KCl solutions at 5 and 25°C. The values of pK1 * were also measured in NaCl with small amounts of added MgCl2 and CaCl2 to I = 6.0 m at 25 °C. The results were used to determine Pitzer coefficients for the interactions of HS- ions with Na+, K+, Mg2+ and Ca2+. Values of the pK1 *, estimated using these coefficients, were found to be in excellent agreement with the measured values. Estimates of pK1 * in seawater and Dead Sea water calculated from the Pitzer coefficients were in excellent agreement with measured values from 5 to 25°C. Thus, it is possible to characterize the thermodynamics of the first dissociation of H2S in most natural waters from 0 to 50°C and I = 0 to 6 m.

AB - The stoichiometric pK1 * for the dissociation of H2S has been determined from emf measurements in NaCl from 0.1 m to saturation at 5, 25 and 45°C and in KCl solutions at 5 and 25°C. The values of pK1 * were also measured in NaCl with small amounts of added MgCl2 and CaCl2 to I = 6.0 m at 25 °C. The results were used to determine Pitzer coefficients for the interactions of HS- ions with Na+, K+, Mg2+ and Ca2+. Values of the pK1 *, estimated using these coefficients, were found to be in excellent agreement with the measured values. Estimates of pK1 * in seawater and Dead Sea water calculated from the Pitzer coefficients were in excellent agreement with measured values from 5 to 25°C. Thus, it is possible to characterize the thermodynamics of the first dissociation of H2S in most natural waters from 0 to 50°C and I = 0 to 6 m.

UR - http://www.scopus.com/inward/record.url?scp=0024219711&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024219711&partnerID=8YFLogxK

U2 - 10.1016/0016-7037(88)90183-4

DO - 10.1016/0016-7037(88)90183-4

M3 - Article

AN - SCOPUS:0024219711

VL - 52

SP - 2047

EP - 2051

JO - Geochmica et Cosmochimica Acta

JF - Geochmica et Cosmochimica Acta

SN - 0016-7037

IS - 8

ER -