Thermodynamics of the dissociation of boric acid in seawater at S = 35 from 0 to 55°C

Rabindra N. Roy, Lakshmi N. Roy, Marcia Lawson, Kathleen M. Vogel, C. Porter Moore, William Davis, Frank J. Millero

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The stoichiometric dissociation constants of boric acid in seawater at S = 35 have been determined from 0 to 55°C. The constants were determined from electromotive force measurements made with the cell, Pt|H2 (g, 1 atm)|;borax in synthetic seawater|;AgCl, Ag. The results are discussed in terms of "total" hydrogen ion scale. Our results are in excellent agreement (±0.0004 in ln K*) with the measurements of Dickson (1990a). This study demonstrates that the measurements made by Dickson (1990a) are more reliable than the earlier measurements (Buch, 1933; Lyman, 1956; Hansson, 1973b) and should be used in all future studies of the carbonate system in seawater.

Original languageEnglish (US)
Pages (from-to)243-248
Number of pages6
JournalMarine Chemistry
Issue number2-4
StatePublished - Dec 1993
Externally publishedYes

ASJC Scopus subject areas

  • Oceanography
  • Chemistry(all)
  • Environmental Chemistry
  • Water Science and Technology


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