99-22U

The investigation of the cation valency influence on cation hydration shell structure was made. The investigation was made in the framework of integral equation technique using the central force model for description of water. The significant modification of water intramolecular structure in hydration shell of ions of high valency was found, also an effect of some hydrogen atoms loss by hydration shell was discovered too. Drawn results are interpreted as the hydrolysis of water caused by ions of high valency.