The speciation of (CH3)2Sn2+ in electrolyte solution containing the major components of natural waters

Claudia Foti, Antonio Gianguzza, Frank J. Millero, Silvio Sammartano

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Hydrolysis constants of dimethyltin(IV) cation, in different salt solutions (CaCl2:0.15 ≤ I ≤ 0.90; MgCl2:0.30 ≤ I ≤ 0.60; NaCl-NaClO4, NaCl-NaNO3 mixtures: I = 3; NaCl-Na2SO4 mixtures: I = 1 mol dm-3) were determined by potentiometric ([H+]-glass electrode) measurements. These data, together with previous data (De Stefano et al., 1996b) were interpreted in terms of DHT (Debye-Huckel type) and Pitzer equations. The mixed electrolyte solution results also allowed us to obtain Θ and Ψ parameters for the Pitzer equation. Calorimetric measurements were made at different ionic strengths in order to find the temperature dependence of hydrolysis constants and of the relative interaction parameters. The body of results allows us to determine the speciation of natural waters in a wide range of ionic strengths and temperatures.

Original languageEnglish (US)
Pages (from-to)381-398
Number of pages18
JournalAquatic Geochemistry
Volume5
Issue number4
DOIs
StatePublished - Dec 1 1999

Keywords

  • Dependence on medium of hydrolysis constants
  • Hydrolysis of (CH)Sn
  • Pitzer interaction parameters
  • Speciation of (CH)Sn in natural waters
  • ΔH°for the hydrolysis of (CH)Sn

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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