Speed of sound in NaCl, MgCl2, Na2SO4, and MgSO4aqueous solutions as functions of concentration, temperature, and pressure

Chen Tung Chen, Lee Sea Chen, Frank J. Millero

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48 Scopus citations


The speeds of sound in aqueous solutions of NaCL, MgCl2, Na2SO4, and MgSO4have been measured relative to pure water from 0 to 1 molal ionic strength, 0° to 55° C, and 0 to 1000 bar applied pressure. The 1-atm results have been fitted to polynomial equations of concentration and temperature with standard deviations of about 0.1 m/s, U0— UW0= am+bm3/2+cm2where U0and UW0are the 1-atm sound speeds in solution and in pure water, respectively; mis molality; and a, b, and c are temperature-dependent parameters. The effect of pressure on the relative speeds of sound has been fitted to equations of the form (Up— UPW)—(U0— UW0) =dm +em 3/2+fm 2, where UpandUPWare the sound speeds of the solution and water at applied pressure P and d, e, and f are temperature and pressure-dependent parameters. The standard deviations of the least-squares fits are within 0.12 m/s for all the salts.

Original languageEnglish (US)
Pages (from-to)1795-1800
Number of pages6
JournalJournal of the Acoustical Society of America
Issue number6
StatePublished - Jun 1978

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


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