Dependence of the values of calcite and aragonite thermodynamic solubility products on ionic models.

E. Sass; J. W. Morse; F. J. Millero

doi:10.2475/ajs.283.3.218

Dependence of the values of calcite and aragonite thermodynamic solubility products on ionic models.

E. Sass
, J. W. Morse
, F. J. Millero

Fredy & Nadine Herrmann Institute of Earth Sciences

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

43 Scopus citations

Abstract

In view of the fact that interpretation of the behaviour of calcite and aragonite in natural waters requires accurate determination of the dynamic solubility products (K_sp) of the minerals, the influence of experimental methods and ionic activity models was investigated. The results demonstrate the need to use activity coefficients based on the ion-pairing model and gave values of pK_sp = 8.48 + or - 0.02 and pK_sp = 8.30 + or - 0.02 for calcite and aragonite, respectively, at 25oC. -M.S.

Original language	English
Pages (from-to)	218-229
Number of pages	12
Journal	American Journal of Science
Volume	283
Issue number	3
DOIs	https://doi.org/10.2475/ajs.283.3.218
State	Published - 1983

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abstract = "In view of the fact that interpretation of the behaviour of calcite and aragonite in natural waters requires accurate determination of the dynamic solubility products (Ksp) of the minerals, the influence of experimental methods and ionic activity models was investigated. The results demonstrate the need to use activity coefficients based on the ion-pairing model and gave values of pKsp = 8.48 + or - 0.02 and pKsp = 8.30 + or - 0.02 for calcite and aragonite, respectively, at 25oC. -M.S.",

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AU - Morse, J. W.

AU - Millero, F. J.

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N2 - In view of the fact that interpretation of the behaviour of calcite and aragonite in natural waters requires accurate determination of the dynamic solubility products (Ksp) of the minerals, the influence of experimental methods and ionic activity models was investigated. The results demonstrate the need to use activity coefficients based on the ion-pairing model and gave values of pKsp = 8.48 + or - 0.02 and pKsp = 8.30 + or - 0.02 for calcite and aragonite, respectively, at 25oC. -M.S.

AB - In view of the fact that interpretation of the behaviour of calcite and aragonite in natural waters requires accurate determination of the dynamic solubility products (Ksp) of the minerals, the influence of experimental methods and ionic activity models was investigated. The results demonstrate the need to use activity coefficients based on the ion-pairing model and gave values of pKsp = 8.48 + or - 0.02 and pKsp = 8.30 + or - 0.02 for calcite and aragonite, respectively, at 25oC. -M.S.

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Dependence of the values of calcite and aragonite thermodynamic solubility products on ionic models.

Abstract

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