The PVT properties of concentrated aqueous electrolytes. IV. Changes in the compressibilities of mixing the major sea salts at 25°C

Frank J Millero, M. Isabel Lampreia

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The speed of sound of mixtures of the six possible combinations of the major sea salt ions (Na+, Mg2+, Cl-, and SO4 2-) have been determined at I=3.0 and at 25°C. The results have been used to determine the changes in the adiabatic compressibility of mixing ΔKm the major sea salts. The values of ΔKm have been fit to the equation ΔKm=y2y3I2[k0+k1(1-2y3)] where yi is the ionic strength fraction of solute i, k0 and k1 are parameters related to the interactions of like-charged ions. The Young cross-square rule is obeyed to within ±0.04×10-6 cm3-kg-1-bar-1. A linear correlation was found between the compressibility k0 and volume v0 interaction parameters (104k0=-0.24+3.999 v0, s=0.15) in agreement with out earlier findings. Estimates of the sound speeds for the cross square mixtures (NaCl+MgSO4 and MgCl2+Na2SO4) were made using the equations of Reilly and Wood. The estimated sound speeds were found to agree on the average with the measured values to ±0.36 m-sec-1.

Original languageEnglish (US)
Pages (from-to)853-864
Number of pages12
JournalJournal of Solution Chemistry
Volume14
Issue number12
DOIs
StatePublished - Dec 1985

Fingerprint

Compressibility
Oceans and Seas
Electrolytes
compressibility
Salts
Acoustic waves
electrolytes
Ions
salts
Magnesium Chloride
acoustics
Acoustic wave velocity
Ionic strength
Wood
Osmolar Concentration
solutes
ions
interactions
estimates

Keywords

  • aqueous electrolytes
  • compressibility
  • MgCl
  • MgSO
  • NaSO
  • NaCl
  • sea salts
  • Speed of sound

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

The PVT properties of concentrated aqueous electrolytes. IV. Changes in the compressibilities of mixing the major sea salts at 25°C. / Millero, Frank J; Lampreia, M. Isabel.

In: Journal of Solution Chemistry, Vol. 14, No. 12, 12.1985, p. 853-864.

Research output: Contribution to journalArticle

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