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Rahmat Sadeghi

Rahmat Sadeghi

Academic rank: Professor
ORCID:
Education: PhD.
ScopusId: 9037288700
HIndex:
Faculty: Faculty of Science
Address: Department of Chemistry, University of Kurdistan, Sanandaj, Iran
Phone:

Research

Title
Volumetric, isentropic compressibility and electrical conductivity of solutions of tri-sodium phosphate in 1-propanol +water mixed-solvent media over the temperature range of 283.15–303.15K
Type
JournalPaper
Keywords
Keywords: Apparent molar volume; Isentropic compressibility; Conductivity; Tri-sodium phosphate; 1-Propanol
Year
2008
Journal FLUID PHASE EQUILIBRIA
DOI
Researchers Rahmat Sadeghi ، Hana Parhizkar

Abstract

Abstract Density, sound velocity and electrical conductivity of solutions of tri-sodium phosphate (Na3PO4) in 1-propanol +water mixed-solvent media with alcohol mass fractions of 0.00, 0.05, 0.10, and 0.15 are reported in the 283.15–303.15K temperature range at 5K intervals. From the experimental density and sound velocity data, the apparent molar volume and isentropic compressibility values of tri-sodium phosphate are evaluated and fitted to a Redlich +Meyer type equation from which the apparent molar volume and apparent molar isentropic compressibility of the solutions at the infinite dilution are calculated at working temperature. The results show a positive transfer volume of Na3PO4 from an aqueous solution to an aqueous 1-propanol solution. The apparent molar isentropic compressibility of Na3PO4 in aqueous 1-propanol solutions is negative and it increases with increasing concentration of Na3PO4, 1-propanol and temperature. The effects of the electrolyte concentration, temperature and relative permittivity of the medium on the molar conductivity are also investigated. Comparisons between the results obtained in this work are made with those for Na2HPO4 and NaH2PO4 obtained in our previous works.