Question

why ionic compound are soluble in the water?

Answer 1

when ionic substance is put into water
the H* and OH~ ions of H2O accumulates around it giving large amount of hydration enthalpy which is more than its lattice enthalpy thus a ionic substance is soluble in water.
its the answer

here
lattice enthalpy =>amount of energy required to separate the ions of a ionic compound
and
hydration enthalpy is the amount of energy releases when a substance is dissolved in water

Answer 2

HEY MATE!!

Plzz refer the attachment

HOPE IT HELPS!!