What is Lithium Bromide?
Lithium bromide is a chemical compound with the formula LiBr. It is soluble in water, alcohol and ether. It is prepared by the action of hydrobromic acid on lithium hydroxide. It has been utilized in small scale for catalytic dehydrohalogenation for the synthesis of olefins. Aqueous solutions of lithium bromide have usually low watervaopour pressures. Concentrated aqueous solutions of lithium bromide can dissolve significant quantities of polar organic substances such as cellulose.
Other names – Lithium monobromide
|
LiBr |
Lithium Bromide |
|
Density |
3.46 g/cm³ |
|
Molecular Weight/ Molar Mass |
86.845 g/mol |
|
Boiling Point |
1,265 °C |
|
Melting Point |
552 °C |
|
Chemical Formula |
LiBr |
Lithium Bromide Structure – LiBr
Physical Properties of Lithium Bromide – LiBr
|
Odour |
No odour |
|
Appearance |
White to pinkish granular powder |
|
Covalently-Bonded Unit |
2 |
|
Heavy Atom Count |
2 |
|
Complexity |
2 |
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Solubility |
Soluble in methanol, ether, ethanol, acetone |
Chemical Properties of Lithium Bromide – LiBr
- Lithium bromide on reacting with chlorine, chlorine replaces bromine and lithium chloride is formed. This is a single displacement reaction.
Cl2 + 2LiBr → Br2 + 2LiCl
- Lithium bromide reacts with silver nitrate forms lithium nitrate and silver bromide. The chemical equation is given below.
LiBr + AgNO3 → LiNO3 + AgBr
Uses of Lithium Bromide – LiBr
- Used as a coolant in industrial air cooling systems working by absorptions.
- Used in pharmaceuticals as a drying agent and for other industrial purposes.
- Used as a sedative and for the treatment of epilepsy.
- Used in the making of collodion dry plate emulsion due to its solubility in alcohol and ether.
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