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The halides of alkali metals are soluble...

The halides of alkali metals are soluble in water except for LiF. Why?

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The solubility of a salt in water depends on its lattice enthalpy as well as its hydration enthalpy. A salt dissolves in water when its hydration enthalpy exceeds its lattice enthalpy value. The lattice enthalpy of LiF is very high and its hydration enthalpy value does not exceed this value. As a result, LiF is insoluble in water.
However, the other halides of alkali metals possess higher hydration enthalpy values compared to their corresponding lattice enthalpies. Hence, they are soluble in water.
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CHHAYA PUBLICATION-s-BLOCK ELEMENTS -SOLVED WBCHSE SCANNER
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  9. Alkali metals become opaque when they are kept open in air-Why?

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  10. Write the basic principles of Solvay process.

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