Densities and Apparent Molar Volumes of Aqueous Solutions of Nitric Acid to High Concentrations and Elevated Temperatures
Hnedkovsky, Lubomir; Vielma, Tuomas; Hefter, Glenn (2024-11-16)
Avaa tiedosto
Sisältö avataan julkiseksi: 16.11.2025
American chemical society
16.11.2024
Hnedkovsky, L., Vielma, T., & Hefter, G. (2025). Densities and apparent molar volumes of aqueous solutions of nitric acid to high concentrations and elevated temperatures. Journal of Chemical & Engineering Data, 70(1), 153–161. https://doi.org/10.1021/acs.jced.4c00339
https://rightsstatements.org/vocab/InC/1.0/
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of chemical and engineering data, copyright © 2024 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jced.4c00339.
https://rightsstatements.org/vocab/InC/1.0/
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of chemical and engineering data, copyright © 2024 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jced.4c00339.
https://rightsstatements.org/vocab/InC/1.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202503282256
https://urn.fi/URN:NBN:fi:oulu-202503282256
Tiivistelmä
Abstract
Densities of aqueous solutions of nitric acid at concentrations from (0.025 to 36) mol·kg–1 (0.16–70% w/w) have been determined by high precision vibrating-tube densitometry. Measurements over the temperature range of 293.15 ≤ T/K ≤ 343.15 were made at 5 K intervals at atmospheric pressure with a commercial apparatus, using an improved measurement protocol. Special attention was given to the dilute concentration region to determine the (conventional) standard partial volume of the nitrate ion. Measurements at higher temperatures (323.15 ≤ T/K ≤ 473.15) were made at seven temperatures at a pressure of 2.0 MPa using a custom-built high-temperature densimeter. For these measurements, the nitric acid concentration was restricted to 15 mol·kg–1 (50% w/w) to minimize the risk of corrosion. The present results greatly expand density and volumetric databases for the aqueous solutions of this critical reagent.
Densities of aqueous solutions of nitric acid at concentrations from (0.025 to 36) mol·kg–1 (0.16–70% w/w) have been determined by high precision vibrating-tube densitometry. Measurements over the temperature range of 293.15 ≤ T/K ≤ 343.15 were made at 5 K intervals at atmospheric pressure with a commercial apparatus, using an improved measurement protocol. Special attention was given to the dilute concentration region to determine the (conventional) standard partial volume of the nitrate ion. Measurements at higher temperatures (323.15 ≤ T/K ≤ 473.15) were made at seven temperatures at a pressure of 2.0 MPa using a custom-built high-temperature densimeter. For these measurements, the nitric acid concentration was restricted to 15 mol·kg–1 (50% w/w) to minimize the risk of corrosion. The present results greatly expand density and volumetric databases for the aqueous solutions of this critical reagent.
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