University of Oulu

Vielma, T., Hefter, G. Sulfate Protonation in Sodium Chloride and Sodium Perchlorate Media. J Solution Chem 51, 962–969 (2022).

Sulfate protonation in sodium chloride and sodium perchlorate media

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Author: Vielma, Tuomas1; Hefter, Glenn2
Organizations: 1Research Unit of Sustainable Chemistry, University of Oulu, 90014, Oulu, Finland
2Chemistry Department, Murdoch University, Murdoch, WA, 6150, Australia
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.8 MB)
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Language: English
Published: Springer Nature, 2022
Publish Date: 2022-08-26


The equilibrium (association) constant, KA, for the first protonation of the sulfate ion in aqueous solution: \([\text{H}^{+}(\text{aq}) + \text{SO}^{2−}_{4}(\text{aq}) ⇌ \text{HSO}^{−}_{4}(\text{aq})]\) has been measured at 298.15 K in NaCl and NaClO₄ media using glass-electrode potentiometry at five ionic strengths in the range 0.5 ≤ I/(mol·dm−3) ≤ 5.0. The present KA values vary smoothly with I and are in good agreement with reliable literature data but indicate that the previously reported value of KA at I = 5 mol·dm−3 in NaClO₄ media is in error.

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Series: Journal of solution chemistry
ISSN: 0095-9782
ISSN-E: 1572-8927
ISSN-L: 0095-9782
Volume: 51
Issue: 8
Pages: 962 - 969
DOI: 10.1007/s10953-022-01179-7
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
Funding: This work was funded by Walter Ahlström Foundation, Finnish Research Impact Foundation (TV) and Murdoch University (GH). Open Access funding provided by University of Oulu including Oulu University Hospital.
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