Question

How is lithium aluminium hydride prepared ? Discuss its properties and uses

Answer 1

Lithium Aluminum Hydride- Chemical formula -LiAlH4

Preparation:
Lithium Aluminium Hydride is obtained by Reacting Lithium Hydride and Aluminium Chloride in presence of Dry Ether .

Chemical Equation:
                         dry ether
4LiH  + AlCl3  ----------------> LiAlH4 + 3LiCl
By this reaction 97% of LiAlH4 is obtained.

Physical properties:
--> It is white crystalline solid.
---> Odourless
---> Density = 0.9 g/ml
---> melting point-150 degree Celsius.

Chemical properties:
--->It reacts violently with water to release hydrogen gas.
--->It is a strong base
--> Powerful reducing agent.

Uses:
----> Very good reducing agent.
----> used in many organic synthesis reaction like reduction of esters, carboxylic acids etc.
-----> As a propellant.

Answer 2

Answer:HERE'S THE ANSWER

Explanation:

Lithium Aluminum Hydride- Chemical formula -LiAlH4

Preparation:

Lithium Aluminium Hydride is obtained by Reacting Lithium Hydride and Aluminium Chloride in presence of Dry Ether .

Chemical Equation:

                         dry ether

4LiH  + AlCl3  ----------------> LiAlH4 + 3LiCl

By this reaction 97% of LiAlH4 is obtained.

Physical properties:

--> It is white crystalline solid.

---> Odourless

---> Density = 0.9 g/ml

---> melting point-150 degree Celsius.

Chemical properties:

--->It reacts violently with water to release hydrogen gas.

--->It is a strong base

--> Powerful reducing agent.

Uses:

----> Very good reducing agent.

----> used in many organic synthesis reaction like reduction of esters, carboxylic acids etc.

-----> As a propellant.