LITHIUM FLUORIDE LiF

Properties of lithium fluoride:

White, melts without decomposition. It is readily soluble in water (hydrolysis does not). Participates in exchange reactions.


Molar mass g/mol 25.94
Density g/cm3 2.635
Melting point °C 845.1
Boiling point °C 1676

Obtaining lithium fluoride:

2 Li + E2 = 2LiE (normal temp., E = F, Cl, Br; t> 200° C, E = I).

LiCl (conc.) + NH4F (conc.) = LiF↓ + NH4Cl.


Reactions with lithium fluoride:

LiF (solid) + HF (conc.) = Li(HF2) (solution).

LiF + H2SO4 (conc.) = LiHSO4 + HF ↑.

LiF + HNO3 (conc.) = LiNO3 + HF ↑.

2 LiF + CaO = Li2O + CaF2 (600—700° C).

2 LiF + Ca(OH)2 (saturated solution, hot) = 2 LiOH + CaF2 ↓


 

Did you know?

Group 1 metals are known as alkali metals.