Statement 1: ${\mathrm{BeSO}}_4$ and ${\mathrm{MgSO}}_4$ are soluble in water.

Statement 2: ${\mathrm{BaSO}}_4$ is water insoluble because lattice energy of ${\mathrm{BaSO}}_4$ is higher than its hydration energy.

${\mathrm{BeSO}}_4$ and ${\mathrm{MgSO}}_4$ are readily soluble in water; the solubility decreases from ${\mathrm{CaSO}}_4$ to ${\mathrm{BaSO}}_4$. The greater hydration enthalpies of ${\mathrm{Be}}^{2+}$ and ${\mathrm{Mg}}^{2+}$ ions overcome the lattice enthalpy factor and therefore their sulphates are soluble in water.