An ionic hydride of an alkali metal has significant covalent character and is almost unreactive towards oxygen and chlorine. This is used in the synthesis of other useful hydrides. Write the formula of this hydride. Write its reaction with Al_{2}Cl_{6}.

Answers (1)

The ionic hydride of an alkali metal which has a significant covalent character and is almost unreactive towards oxygen and chlorine at moderate temperatures is, lithium hydride is unreactive. That is why it is used for the synthesis of other useful hydrides.

 

Its reaction to Al_{2}Cl_{6} can be explained as follows: -

 

8LiH + Al_{2}Cl_{6} \rightarrow 2LiAlH_{4} + 6LiCl

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