Temperature and Concentration Dependences of pH in Aqueous NaCl Solutions with Dissolved Atmospheric CO2

Authors

  • L.A. Bulavin Taras Shevchenko National University of Kyiv, Faculty of Physics
  • N.P. Malomuzh Odessa I.I. Mechnikov National University
  • O.V. Khorolskyi Poltava V.G. Korolenko National Pedagogical University

DOI:

https://doi.org/10.15407/ujpe67.12.833

Keywords:

aqueous solution, sodium chloride, acid-base balance, carbon dioxide, relaxation time

Abstract

Temporal variations in the temperature and concentration dependences of the acid-base balance (pH) in dilute aqueous sodium chloride (NaCl) solutions contacting with atmospheric carbon dioxide (CO2) have been studied. The measurements are carried out for the inverse ion concentrations corresponding to 180, 215, 270, and 360 water molecules per sodium or chlorine ion and in a temperature interval of 294–323 K. The pH relaxation times in aqueous NaCl solutions with dissolved atmospheric CO2 and the corresponding temperature and salt-concentration dependences are calculated. For aqueous salt solutions characterized by a
temperature and an irreducible pH component, a principle for selecting the optimal states is formulated: optimal are those values that provide the minimum pH relaxation time. On this basis, the temperature interval of human activity is determined to extend from (30 ± 2) C to 42 C.

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Published

2023-02-14

How to Cite

Bulavin, L., Malomuzh, N., & Khorolskyi, O. (2023). Temperature and Concentration Dependences of pH in Aqueous NaCl Solutions with Dissolved Atmospheric CO2. Ukrainian Journal of Physics, 67(12), 833. https://doi.org/10.15407/ujpe67.12.833

Issue

Section

Physics of liquids and liquid systems, biophysics and medical physics

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