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

J. Peter Hershey; Tinka Plese; Frank J. Millero

doi:10.1016/0016-7037(88)90183-4

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

J. Peter Hershey, Tinka Plese, Frank J. Millero

Ocean Sciences

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

49 Scopus citations

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 language	English (US)
Pages (from-to)	2047-2051
Number of pages	5
Journal	Geochimica et Cosmochimica Acta
Volume	52
Issue number	8
DOIs	https://doi.org/10.1016/0016-7037(88)90183-4
State	Published - Aug 1988

ASJC Scopus subject areas

Geochemistry and Petrology

Access to Document

10.1016/0016-7037(88)90183-4

Fingerprint Dive into the research topics of 'The pK1* for the dissociation of H2S in various ionic media'. Together they form a unique fingerprint.

Cite this

@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",

month = aug,

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 - 1988/8

Y1 - 1988/8

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 -