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LiBr - Lithium Bromide

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 on a small scale for catalytic dehydrohalogenation for the synthesis of olefins. Aqueous solutions of lithium bromide have usually low water vapour 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

Table of Contents

Lithium Bromide Structure – LiBr

Lithium Bromide Structure

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
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 and 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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