Influence of temperature on the structure of concentrated aqueous solutions of sodium chloride, studied by the method of integral equations

The features of structure formation in 5.41 and 3.02 m aqueous solutions of NaCl at high temperatures were studied by the method of integral equations. The results suggest that heating will cause significant distortion of the solvent structure, disappearance of its tetrahedral ordering, and appreciable decrease in the number of hydrogen bonds. Heating will result in decreased ordering of water molecules in the first hydration spheres of both ions. At high temperatures the content of contact ion pairs in solutions considerably increases, and that of hydrate-separated ion pairs decreases. The temperature exerts a stronger effect on the structure of the less concentrated solution.