Effects of the Hydration of Ions in the Freezing of Mixed Aqueous Solutions, According to NMR Data on Protons and 23Na Nuclei

Results are presented from studying the temperature dependences of the characteristic intensity of NMR signals and period T 1 of relaxation on protons and nuclei of sodium in mixed aqueous solutions of sodium chloride with additions of salts of CaCl 2 , KCl, MgCl 2 , and MgSO 4 of different concentr...

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Bibliographic Details
Published in:Russian Journal of Physical Chemistry A 2022, Vol.96 (10), p.2133-2136
Main Authors: Melnichenko, N. A., Savchenko, V. G., Abramov, A. S.
Format: Article
Language:English
Subjects:
Aqueous solutions
Calcium chloride
Chemistry
Chemistry and Materials Science
Freezing
Hydration
Magnesium chloride
NMR
Nuclear magnetic resonance
Nuclei
Physical Chemistry
Physical Chemistry of Solutions
Protons
Sodium chloride
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Summary:Results are presented from studying the temperature dependences of the characteristic intensity of NMR signals and period T 1 of relaxation on protons and nuclei of sodium in mixed aqueous solutions of sodium chloride with additions of salts of CaCl 2 , KCl, MgCl 2 , and MgSO 4 of different concentrations. Effects of ion hydration in the freezing of mixed solutions are shown. The eutectic point of NaCl does not shift in the presence of other salts, period T 1 of relaxation on protons experiences a sharp jump in the region of the NaCl eutectic point, and T 1 changes only slightly on sodium nuclei.
ISSN:0036-0244
1531-863X
DOI:10.1134/S0036024422100223