Volumetric properties of disodium dihydrogen pyrophosphate aqueous solution from 283.15 to 363.15 K at 101.325 kPa

Umarbek Alimov; Kaiyu Zhao; Jiayin Hu; Yafei Guo; Lingzong Meng; Xiuyun Pan; Tianlong Deng

doi:10.1016/j.foodchem.2021.129410

Volumetric properties of disodium dihydrogen pyrophosphate aqueous solution from 283.15 to 363.15 K at 101.325 kPa

Food Chem. 2021 Aug 1:352:129410. doi: 10.1016/j.foodchem.2021.129410. Epub 2021 Mar 2.

Authors

Umarbek Alimov¹, Kaiyu Zhao², Jiayin Hu², Yafei Guo³, Lingzong Meng⁴, Xiuyun Pan⁵, Tianlong Deng⁶

Affiliations

¹ State Key Laboratory of Food Safety and Nutrition, Tianjin Key Laboratory of Marine Resources and Chemistry, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, PR China; Institute of General and Inorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan, 77, Mirzo Ulugbek, Tashkent 100170, Uzbekistan.
² State Key Laboratory of Food Safety and Nutrition, Tianjin Key Laboratory of Marine Resources and Chemistry, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, PR China.
³ State Key Laboratory of Food Safety and Nutrition, Tianjin Key Laboratory of Marine Resources and Chemistry, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, PR China. Electronic address: guoyafei@tust.edu.cn.
⁴ School of Chemistry Engineering, Linyi University, Linyi 276000, PR China.
⁵ Hubei Yixin Salt Industry Technology Research Institute Co. LTD, Xiaogan 432400, PR China.
⁶ State Key Laboratory of Food Safety and Nutrition, Tianjin Key Laboratory of Marine Resources and Chemistry, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, PR China. Electronic address: tldeng@tust.edu.cn.

PMID: 33677210
DOI: 10.1016/j.foodchem.2021.129410

Abstract

The purpose of this exploration was to determine the density and volumetric properties of the aqueous solution of Na₂H₂P₂O₇ with the molality varied from 0.08706 to 0.88402 mol·kg^-1 measured at temperature intervals of 5 K from 283.15 to 363.15 K at 101.325 kPa using Anton Paar Digital vibrating-tube densimeter. The thermal expansion coefficient (α), apparent molar volume (V_Φ), expansibility (ϕ_E), and partial molar volume (V_B) of Na₂H₂P₂O₇ (aq) against temperature and molality have been evaluated from density data. On the basis of Pitzer ion-interaction apparent molar volume theory, the Pitzer single-salt parameters (β_M,X^0v, β_M,X^1v, β_M,X^2v and C_M,X^v, MX = Na₂H₂P₂O₇), and their correlation coefficients a_i of the temperature-dependence formula f (i, p, T) = a₁ + a₂ln(T/298.15) + a₃(T - 298.15) + a₄/(620 - T) + a₅/(T - 227) for Na₂H₂P₂O₇ were obtained for the first time. It was revealed that predicted apparent molar volumes agreed well with the experimental values indicating the single salt parameters and the temperature-dependent formula are reliable.

Keywords: Apparent molar volumes; Density; Disodium dihydrogen pyrophosphate; Pitzer ion-interaction model.

MeSH terms

Diphosphates / chemistry*
Pressure
Solutions
Temperature*
Water / chemistry*

Substances

Diphosphates
Solutions
Water
sodium pyrophosphate