The structure of concentrated aqueous KBr solutions in the temperature interval 298-623 K

The structural characteristics of aqueous solutions of KBr : nH(2)O (n = 11, 15, 18) is studied as a function of temperature (T = 298-623 K) at a constant pressure (p = 20 MPa). The results obtained by the integral equations method indicate that H2O molecular ordering in solutions considerably decreases with an increase in temperature. The tetrahedral ordering of the water structure only exists to T = 323 K. It was found that the effect of the salt concentration on the structure of the solvent itself decreases with an increase in temperature. It is shown that the effect of temperature is to considerably destroy the first hydration shells of K+ and Br- ions to cause a considerable growth of contact associates in solutions.