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Why are lithium salts commonly hydrated ...

Why are lithium salts commonly hydrated and those of the other alkali ions usually anhydrous?

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`Li^(+)` ions are the smallest of all alkali metal ions. Due to small size, they can polarise water molecules, attach them and get hydrated easily in comparison to other alkali metal ions. This is why lithium salts are commonly hydrated, e.g. LICI `2H_2O`.
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