Question

Solubility of an ionic compound in water is mainly dependent on:
a.Lattice enthalpy , b. Hydration enthalphy
Both these factors oppose each other and the resultant of these determines the solubility of an ionic compound in water. If lattce enthalpy has greater value, the compound is less soluble.
In case hydration enthalpy has greater value, the compound is highly soluble in water. Compound is soluble in water if
A. Hydration enthalpy is greater than lattice enthalpy
B. Hydration enthalpy is less than lattice enthalpy
C. hydration enthalpy and lattice enthalpy are same
D. None of the above

Answer 1

Correct Answer - A
If hydration enthalpy is greater than the lattice enthalpy, electrostatic force of attraction between the cation and the anion is easily overcome and the ionic compound dissolves in water.