EXPERIMENTAL-EVIDENCE OF INTERACTIONS SO4(2-)-H2O IN AN AQUEOUS-SOLUTION

The scattering of X-rays from a (NH4)2SO4 aqueous solution has been measured and analysed at 25°C. It is shown that the sample may be considered as a solution of sulphate ions in water. In this way the existence of discrete SO-24 -H2O interactions can be unambiguously demonstrated. Good agreement with experimental data is achieved through a model in which each oxygen atom in the sulphate ion gives rise to about two hydrogen bonds with water molecules. © 1979.