Densities and compressibilities of aqueous sodium carbonate and bicarbonate from 0 to 45°C

J. Peter Hershey; Sara Sotolongo; Frank J. Millero

doi:10.1007/BF00646199

Densities and compressibilities of aqueous sodium carbonate and bicarbonate from 0 to 45°C

J. Peter Hershey, Sara Sotolongo, Frank J. Millero

Ocean Sciences

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

The densities and the sound speeds of aqueous NaHCO₃ and Na₂CO₃ solutions were measured from 0.05 to 1.0m and from 0 to 45°C. These data were fitted to functions of molality and temperature and were used to calculate the apparent molal volumes V_φ{symbol} and compressibilites κ_φ of these solutions. Polynomial expression for V_φ{symbol} and κ_φ as functions of molality and temperature have been determined. The partial molal volumes and compressibilities of these solutions and literature data have been used to determine the volume ΔV and compressibility Δκ changes for the ionization of carbonic acid in aqueous solutions. These values of ΔV and Δκ have been used to estimate the effect of pressure on the ionization constants for carbonic acid from 0 to 45°C. The calculated pressure coefficients are in good agreement with the measured values.

Original language	English (US)
Pages (from-to)	233-254
Number of pages	22
Journal	Journal of Solution Chemistry
Volume	12
Issue number	4
DOIs	https://doi.org/10.1007/BF00646199
State	Published - Apr 1 1983

Keywords

NaCO
NaHCO
carbonic acid
compressibility
density
ionization
partial molal volume
pressure effects
sound speed

ASJC Scopus subject areas

Biophysics
Biochemistry
Molecular Biology
Physical and Theoretical Chemistry

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title = "Densities and compressibilities of aqueous sodium carbonate and bicarbonate from 0 to 45°C",

abstract = "The densities and the sound speeds of aqueous NaHCO3 and Na2CO3 solutions were measured from 0.05 to 1.0m and from 0 to 45°C. These data were fitted to functions of molality and temperature and were used to calculate the apparent molal volumes Vφ{symbol} and compressibilites κφ of these solutions. Polynomial expression for Vφ{symbol} and κφ as functions of molality and temperature have been determined. The partial molal volumes and compressibilities of these solutions and literature data have been used to determine the volume ΔV and compressibility Δκ changes for the ionization of carbonic acid in aqueous solutions. These values of ΔV and Δκ have been used to estimate the effect of pressure on the ionization constants for carbonic acid from 0 to 45°C. The calculated pressure coefficients are in good agreement with the measured values.",

keywords = "NaCO, NaHCO, carbonic acid, compressibility, density, ionization, partial molal volume, pressure effects, sound speed",

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T1 - Densities and compressibilities of aqueous sodium carbonate and bicarbonate from 0 to 45°C

AU - Hershey, J. Peter

AU - Sotolongo, Sara

AU - Millero, Frank J.

PY - 1983/4/1

Y1 - 1983/4/1

N2 - The densities and the sound speeds of aqueous NaHCO3 and Na2CO3 solutions were measured from 0.05 to 1.0m and from 0 to 45°C. These data were fitted to functions of molality and temperature and were used to calculate the apparent molal volumes Vφ{symbol} and compressibilites κφ of these solutions. Polynomial expression for Vφ{symbol} and κφ as functions of molality and temperature have been determined. The partial molal volumes and compressibilities of these solutions and literature data have been used to determine the volume ΔV and compressibility Δκ changes for the ionization of carbonic acid in aqueous solutions. These values of ΔV and Δκ have been used to estimate the effect of pressure on the ionization constants for carbonic acid from 0 to 45°C. The calculated pressure coefficients are in good agreement with the measured values.

AB - The densities and the sound speeds of aqueous NaHCO3 and Na2CO3 solutions were measured from 0.05 to 1.0m and from 0 to 45°C. These data were fitted to functions of molality and temperature and were used to calculate the apparent molal volumes Vφ{symbol} and compressibilites κφ of these solutions. Polynomial expression for Vφ{symbol} and κφ as functions of molality and temperature have been determined. The partial molal volumes and compressibilities of these solutions and literature data have been used to determine the volume ΔV and compressibility Δκ changes for the ionization of carbonic acid in aqueous solutions. These values of ΔV and Δκ have been used to estimate the effect of pressure on the ionization constants for carbonic acid from 0 to 45°C. The calculated pressure coefficients are in good agreement with the measured values.

KW - NaCO

KW - NaHCO

KW - carbonic acid

KW - compressibility

KW - density

KW - ionization

KW - partial molal volume

KW - pressure effects

KW - sound speed

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Densities and compressibilities of aqueous sodium carbonate and bicarbonate from 0 to 45°C

Abstract

Keywords

ASJC Scopus subject areas

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