Which of the following is least soluble in water?
BeCl2
MgCl2
CaCl2
SrCl2
As we learn
Solubility of halides of alkaline metals -
Except all other halides are water soluble because of their ionic character
- wherein
Due to decrease in hydration energy
Due to lesser hydration energy and high lattice energy, BeCl2 is least soluble in water.