### Abstract

The densities of KCl and K_{2}SO_{4} were measured from dilute solutions to saturation from 5 to 95°C. The data were combined with literature data to produce density and apparent molal volume, V_{φ}, equations from 0 to 100°C and to saturation. The standard deviations of the density equations were 30×10^{-6} g-cm^{-3} and 32×10^{-6} g-cm^{-3}, respectively, for KCl and K_{2}SO_{4}. Pitzer equations were used to fit the V_{φ} data. The resulting infinite dilute partial molal volumes, V^{o}, were in reasonable agreement with literature data. The densities of the mixtures of the six combinations of the salts KCL, K_{2}SO_{4} NaCl and Na_{2}SO_{4} were measured at I=2.0 and t=5, 25, 55 and 95°C. The resulting volumes of mixing were fitted to equations of the form {Mathematical expression} where v_{ 0} and v_{ 1} are interaction parameters. The cross square rule is valid over the entire temperature range although the deviations are larger at higher temperatures. Pitzer θ_{ NaK}^{ v} and {Mathematical expression} parameters were determined from the common ion mixtures. The values of θ_{ NaK}^{ v} were small and not strongly dependent upon temperature. The values of {Mathematical expression} were also small and changed considerably with temperature.

Original language | English (US) |
---|---|

Pages (from-to) | 353-374 |

Number of pages | 22 |

Journal | Journal of Solution Chemistry |

Volume | 19 |

Issue number | 4 |

DOIs | |

State | Published - Apr 1990 |

### Fingerprint

### Keywords

- Densities
- KSO
- KCl
- partial molal volumes
- Pitzer theory

### ASJC Scopus subject areas

- Physical and Theoretical Chemistry
- Molecular Biology
- Biophysics
- Biochemistry

### Cite this

*Journal of Solution Chemistry*,

*19*(4), 353-374. https://doi.org/10.1007/BF00648141

**The PVT properties of concentrated aqueous electrolytes IX. The volume properties of KCl and K2SO4 and their mixtures with NaCl and Na2SO4 as a function of temperature.** / Dedick, Eugene A.; Hershey, J. Peter; Sotolongo, Sara; Stade, David J.; Millero, Frank J.

Research output: Contribution to journal › Article

*Journal of Solution Chemistry*, vol. 19, no. 4, pp. 353-374. https://doi.org/10.1007/BF00648141

}

TY - JOUR

T1 - The PVT properties of concentrated aqueous electrolytes IX. The volume properties of KCl and K2SO4 and their mixtures with NaCl and Na2SO4 as a function of temperature

AU - Dedick, Eugene A.

AU - Hershey, J. Peter

AU - Sotolongo, Sara

AU - Stade, David J.

AU - Millero, Frank J

PY - 1990/4

Y1 - 1990/4

N2 - The densities of KCl and K2SO4 were measured from dilute solutions to saturation from 5 to 95°C. The data were combined with literature data to produce density and apparent molal volume, Vφ, equations from 0 to 100°C and to saturation. The standard deviations of the density equations were 30×10-6 g-cm-3 and 32×10-6 g-cm-3, respectively, for KCl and K2SO4. Pitzer equations were used to fit the Vφ data. The resulting infinite dilute partial molal volumes, Vo, were in reasonable agreement with literature data. The densities of the mixtures of the six combinations of the salts KCL, K2SO4 NaCl and Na2SO4 were measured at I=2.0 and t=5, 25, 55 and 95°C. The resulting volumes of mixing were fitted to equations of the form {Mathematical expression} where v 0 and v 1 are interaction parameters. The cross square rule is valid over the entire temperature range although the deviations are larger at higher temperatures. Pitzer θ NaK v and {Mathematical expression} parameters were determined from the common ion mixtures. The values of θ NaK v were small and not strongly dependent upon temperature. The values of {Mathematical expression} were also small and changed considerably with temperature.

AB - The densities of KCl and K2SO4 were measured from dilute solutions to saturation from 5 to 95°C. The data were combined with literature data to produce density and apparent molal volume, Vφ, equations from 0 to 100°C and to saturation. The standard deviations of the density equations were 30×10-6 g-cm-3 and 32×10-6 g-cm-3, respectively, for KCl and K2SO4. Pitzer equations were used to fit the Vφ data. The resulting infinite dilute partial molal volumes, Vo, were in reasonable agreement with literature data. The densities of the mixtures of the six combinations of the salts KCL, K2SO4 NaCl and Na2SO4 were measured at I=2.0 and t=5, 25, 55 and 95°C. The resulting volumes of mixing were fitted to equations of the form {Mathematical expression} where v 0 and v 1 are interaction parameters. The cross square rule is valid over the entire temperature range although the deviations are larger at higher temperatures. Pitzer θ NaK v and {Mathematical expression} parameters were determined from the common ion mixtures. The values of θ NaK v were small and not strongly dependent upon temperature. The values of {Mathematical expression} were also small and changed considerably with temperature.

KW - Densities

KW - KSO

KW - KCl

KW - partial molal volumes

KW - Pitzer theory

UR - http://www.scopus.com/inward/record.url?scp=51249174431&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=51249174431&partnerID=8YFLogxK

U2 - 10.1007/BF00648141

DO - 10.1007/BF00648141

M3 - Article

AN - SCOPUS:51249174431

VL - 19

SP - 353

EP - 374

JO - Journal of Solution Chemistry

JF - Journal of Solution Chemistry

SN - 0095-9782

IS - 4

ER -