How would you explain the given observations? Ba0 is soluble but BaSO_4, is insoluble in water.

How would you explain the given observations? Ba0 is soluble but BaSO

1.	How would you explain the given observations? Ba0 is soluble but BaSO_4, is insoluble in water.
Answer» SOLUTION :Large `Be^(2+)`ion is TIGHTLY packed with large `SO_4^(2-)` ion and thus, lattice enthaipy of `BaSO_4` is greater than its hydration enthalpy. So, `BaSO_4` is insoluble in water On the CONTRARY, large `BA^(2+)` ion is loosely packed with SMALL `O^(2-)` ion and thus lattice enthalpy of BaO is less than its hydration enthalpy. So, BaO is water soluble.