The Ionization Constant of Carbonic Acid in Water and the Solubility of Carbon Dioxide in Water and Aqueous Salt Solutions from 0 to 50°

Harned, Herbert S.; Davis, R. T.

doi:10.1021/ja01250a059

Cited by 574 publications

(242 citation statements)

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“…Based on the early work of Lyman (1957), Edmond and Gieskes (1970) presented a set of equations for K, and K, as a function of temperature (very close to the classic pure-water equations of Hamed and Davis 1943) and chlorinity. These equations were revised by Mook and Koene (1975) for very low chlorinity by using the exact form of the Harned and Davis (1943) equations plus a chlorinity term. In this work, we use K, and K2 of Mehrbach et al (1973) at high salinities, those of Edmond and Gieskes (1970) and Mook and Koene (1975) at low salinities, and those of Harned and Davis (1943) at salinities near 0.…”

Section: Resultsmentioning

confidence: 99%

The chemistry, fluxes, and sources of carbon dioxide in the estuarine waters of the Satilla and Altamaha Rivers, Georgia

Cai

Wang

1998

Limnology & Oceanography

475

317

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The pH, alkalinity (Alk), and dissolved inorganic carbon (DIC) in estuarine waters of several rivers of Georgia in the southeastern United States are reported. Although they discharge into a narrow area in the South Atlantic Bight, the rivers along the coast of Georgia differ significantly in their drainage area (Piedmont rivers vs. coastal plain rivers), chemical composition (contents of carbonate and humics), and discharge rates. Large differences in pH, DIC, and Alk between these rivers clearly reflect the differences of material inputs to the rivers. Dramatic pH increases in the early stage of mixing (more obvious for the coastal plain rivers) reflect the low buffering capacity of the river waters despite the high content of humic substances. Flux of riverine DIC to the South Atlantic Bight is estimated to be 52.5 X lo9 mol yr-*. We suggest that the presently available world total riverine DIC flux to the ocean could have much uncertainty if the small river fluxes are important. Calculated pC0, values from the pH and DIC measurements are extremely high in low-salinity areas (1,000 to >6,000 patm at salinity < 10) as are the corresponding CO, fluxes to the atmosphere (20 to >250 mol m-* yr-I at salinity

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Section: Resultsmentioning

confidence: 99%

The chemistry, fluxes, and sources of carbon dioxide in the estuarine waters of the Satilla and Altamaha Rivers, Georgia

Cai

Wang

1998

Limnology & Oceanography

475

317

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“…These have been calculated for a solution at an initial stoichiometric molality of 1.0 mol kg-l in Na 2 co 3 or NaHco 3 • The various contributions to equation (11) are detailed; as with the heat capacities, contributions stemming -.…”

Section: Resultsmentioning

confidence: 99%

“…The experimental data here considered include the emf measurements of Harned and Davis [11] and Harned and Bonner {12] which formed the basis of our earlier report on sodium bicarbonate {13]. These concern the cell Pt(s),H 2 (gLco 2 (g) I NaCl(m 1 ), The activity coefficient of Na 2 co 3 is obtainable at low molalities from the work of Harned and Scholes {15], who measured the potentials of similar cells with solutions containing NaCl, NaHco 3 and Na 2 co 3 and withou~ co 2 (g).…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics of aqueous carbonate solutions including mixtures of sodium carbonate, bicarbonate, and chloride

Roy

Gibbons

Williams

et al. 1982

The Journal of Chemical Thermodynamics

156

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“…It is interesting to note that Plummer and Busenberg 27 did not trust the values of the Henry constant of Harned and Davis, 50 The original raw data were obtained with a Harned cell (i.e., a platinum electrode in the presence of hydrogen gas and a silver chloride-silver electrode without liquid junction) using a CO 2 -H 2 mixture as the gas phase. 50 Care had been taken to have barometric pressure and an equilibrium water vapor pressure in the cell.…”

Section: Thermodynamic Datamentioning

confidence: 99%

“…50 Care had been taken to have barometric pressure and an equilibrium water vapor pressure in the cell. Measurements were done at 0-50 C, various CO 2 -H 2 mixing ratios, and an equimolal mixture of NaCl and NaHCO 3 in aqueous solution with molalities m 1 of each salt ranging from 0.002 m to 0.1 m. The electromotive force of the cell is given by …”

Section: Thermodynamic Datamentioning

confidence: 99%

IUPAC-NIST Solubility Data Series. 95. Alkaline Earth Carbonates in Aqueous Systems. Part 1. Introduction, Be and Mg

Visscher

Vanderdeelen

Königsberger

et al. 2012

Journal of Physical and Chemical Reference Data

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The alkaline earth carbonates are an important class of minerals. This volume compiles and critically evaluates solubility data of the alkaline earth carbonates in water and in simple aqueous electrolyte solutions. Part 1, the present paper, outlines the procedure adopted in this volume in detail, and presents the beryllium and magnesium carbonates. For the minerals magnesite (MgCO 3 ), nesquehonite (MgCO 3 Á3H 2 O), and lansfordite (MgCO 3 Á5H 2 O), a critical evaluation is presented based on curve fits to empirical and=or thermodynamic models. Useful side products of the compilation and evaluation of the data outlined in the introduction are new relationships for the Henry constant of CO 2 with Sechenov parameters, and for various equilibria in the aqueous phase including the dissociation constants of CO 2 (aq) and the stability constant of the ion pair MCO 0 3 ðaqÞ (M ¼ alkaline earth metal). Thermodynamic data of the alkaline earth carbonates consistent with two thermodynamic model variants are proposed. The model variant that describes the Mg 2þ ÀHCO À 3 ion interaction with Pitzer parameters was more consistent with the solubility data and with other thermodynamic data than the model variant that described the interaction with a stability constant.

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The Ionization Constant of Carbonic Acid in Water and the Solubility of Carbon Dioxide in Water and Aqueous Salt Solutions from 0 to 50°

Cited by 574 publications

References 0 publications

The chemistry, fluxes, and sources of carbon dioxide in the estuarine waters of the Satilla and Altamaha Rivers, Georgia

The chemistry, fluxes, and sources of carbon dioxide in the estuarine waters of the Satilla and Altamaha Rivers, Georgia

Thermodynamics of aqueous carbonate solutions including mixtures of sodium carbonate, bicarbonate, and chloride

IUPAC-NIST Solubility Data Series. 95. Alkaline Earth Carbonates in Aqueous Systems. Part 1. Introduction, Be and Mg

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