Question

"$LiI$ has greater solubility in water than $CsI$."
Answer whether the above statement is true or false.
If true enter 1, else enter 0.

Answer 1

LiI has greater solubility in water than CsI.

Generally all alkali metal halides are soluble in water due to their high ionic character and low lattice energy.

· Higher the hydration energy of the ions greater is the solubility of the compound in water.

· Further the extent of hydration depends upon the size of the ions. Smaller the size of the ion, more highly it is hydrated.

· The solubility of the most of alkali metal halides except those of fluorides decreases on descending the group since the decrease in hydration energy is more than the corresponding decrease in the lattice energy.

Hence, the correct answer is 1.