Lithium Bromide Formula

Lithium Bromide Formula

Lithium bromide is also known by the names lithium monobromide or Lithium Bromide Formula. The Lithium Bromide Formula is basically a lithium salt where the counterion is bromide. Additionally, the anhydrous salt of lithium bromide forms cubic crystals similar to table salt (sodium chloride NaCl).

Lithium Bromide Formula Structure

The chemical formula for lithium bromide is LiBr. The molecular weight is 86.845 g/mol. During the formation of lithium bromide, the lithium-ion carries a positive charge Li+ and the bromide ion carries a negative charge Br-. When they come together during the reaction, the ions attract each other to form lithium bromide (LiBr). Learners can check the Lithium Bromide Formula on Extramarks.

Properties Of Lithium Bromide Formula

Basically, it is both a bromine salt and a lithium salt. This compound is highly hygroscopic and serves as a desiccant in air conditioning systems. Learn the Lithium Bromide Formula on Extramarks

Production of Lithium Bromide

Production of lithium bromide

Lithium bromide can be made by reacting lithium carbonate with hydrobromic acid. In contrast to other alkali bromide salts which are made from some crystalline hydrates.

Lithium hydroxide also reacts with hydrobromic acid (an aqueous solution of hydrogen bromide) from lithium bromide. Here is the reaction:


Physical properties of lithium bromide

It is a white crystalline deliquescent solid. Lithium bromide has a density of 3.464 g/cm3, a melting point of 552 °C and a boiling point of 1265 °C. Lithium bromide aqueous solutions usually have a low water vapour pressure. In addition, it can form hydrates such as LiBr.H2O, LiBr.2H2O, LiBr.3H2O and LiBr.5H2O.

However, all these hydrates have different melting points. In addition, concentrated aqueous solutions of lithium bromide can dissolve large amounts of polar organic materials such as cellulose. Lithium bromide is as soluble as lithium chloride in polar organic solvents such as alcohol. Students are advised to learn Lithium Bromide Formula.

Chemical properties of lithium bromide

It has a white cubic, hygroscopic structure. Its refractive index is 1.784. It dissolves well in water and dissolves well in hot water and is also soluble in ethanol, methanol and ether. It is freely soluble in pyridine and has vapour pressures of 5 and 0.7 torr at 25 °C in 52 and 68% aqueous solutions. Check Lithium Bromide Formula for more information.

Uses of lithium bromide

Lithium bromide is used as a desiccant for air conditioners. Along with water, lithium bromide is used as a salt to absorb the cold. It is useful as a reagent for organic synthesis. For example, it forms reversible adducts with some pharmaceuticals.

It was also used in the medical field as a sedative in the early 1990s and was disapproved in the 1940s after some patients died after using it as a salt substitute. Lithium carbonate and lithium chloride can both be used to treat the bipolar psychological disorder.

Safety and health hazards of lithium bromide

Lithium bromide is mildly caustic and psychotropic. Due to the negative enthalpy of the solution, it immediately generates heat when dissolved in water. It is acutely toxic if swallowed and causes irritation on skin contact. In addition, it can cause allergic reactions and severe eye irritation in some people. Additionally, anhydrous lithium bromide is highly hygroscopic and can cause dehydration and localised burns in contact with tissue. When ingested, it can cause gastrointestinal irritation such as vomiting, diarrhoea and nausea.

Solved Example for You

Question: How is lithium bromide manufactured?

Solution: Lithium bromide can be made by reacting lithium carbonate with an aqueous solution of hydrobromic acid.


For Lithium Bromide Formula and other formulas, students can visit the website of Extramarks.

Chemistry Related Formulas
Internal Energy Formula Potassium Bromate Formula
Magnesium Carbonate Formula Potassium Sulfite Formula
Magnesium Phosphate Formula Sensible Heat Formula
Mass Percent Formula Silver Phosphate Formula
Partial Pressure Formula Strontium Nitrate Formula
Potasium Carbonate Formula Aluminium Sulfide Formula
Potassium Chlorate Formula Calcium Iodide Formula
Pyridine Formula Diffusion Formula
Silver Chloride Formula Hydrosulfuric Acid Formula
Sodium Hypochlorite Formula Lead IV Oxide Formula