Correlations for Densities of Aqueous Electrolyte Solutions

Nguyen H. Nguyen, Fazle Hussain, Chau Chyun Chen

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We present simple %-level accuracy universal correlations for densities of aqueous electrolyte solutions at 298.15 K and 0.1 MPa. The developed expressions and parameters are based on 1032 experimental density data points for 56 aqueous single electrolyte solutions including chlorides, bromides, iodides, bicarbonates, carbonates, sulfates, nitrates, nitrites, phosphates, hydrogen phosphates, and dihydrogen phosphates. The correlations relate the solution density with "excess" mass fraction of electrolytes in solution. With molar mass and concentrations of electrolytes as input, the correlation yields density results for all 56 electrolytes with the average error of 0.97% and the maximum error of 8.05%. When grouping the electrolytes as either structure making, structure breaking, or structure superbreaking, the correlations yield the average error of 0.59% and the maximum error of 3.45%. The correlations should be very useful in estimating the density of aqueous single and multicomponent electrolyte solutions including high-salinity produced water from oil and gas production.

Original languageEnglish (US)
Pages (from-to)740-747
Number of pages8
JournalJournal of Chemical and Engineering Data
Issue number2
StatePublished - Feb 11 2016

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)


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