Question

Identify the metal halide which is most prone to form hydrates most readily.
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Answer 1

Magnesium Chloride is the Answer.

Explanation:

1. Magnesium chloride is a chemical compound.  
2. Called as a salt of magnesium along with halogen.  
3. $MgCl_2(H_2O)_x$ forms the hydrates immediately or at a fast rate
4. Water molecules approach the $MgCl_2$ lattice and start to pull off the individual ions ($Mg2^+\ and\ Cl^-)$ with them.
5. This essentially breaks down the ionic lattice and requires energy equal to the magnitude of the Lattice Energy of $MgCl_2$.