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Question

LiAlH4 is obtained by reacting an excess of ___ with an ethereal solution of AlCl3:

A
LiCl
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B
LiH
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C
Li
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D
LiOH
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Solution

The correct option is D LiH
4LiH+AlCl3LiAlH4+3LiCl

Idustrially, first sodium aluminium hydride is prepared fom the elements
under high temperature and high pressure:

Na+Al+2H2NaAlH4

Using salt metathesis,
NaAlH4+LiClLiAlH4+NaCl

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