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Hydrobromic acid is an aqueous solution of hydrogen bromide.It is a strong acid formed by dissolving the diatomic molecule hydrogen bromide (HBr) in water. "Constant boiling" hydrobromic acid is an aqueous solution that distills at 124.3 °C (255.7 °F) and contains 47.6% HBr by mass, which is 8.77 mol/L. Hydrobromic acid is one of the strongest mineral acids known.
HBr can be prepared by distillation of a solution of sodium bromide or potassium bromide with phosphoric acid or sulfuric acid: [14] KBr + H 2 SO 4 → KHSO 4 + HBr. Concentrated sulfuric acid is less effective because it oxidizes HBr to bromine: 2 HBr + H 2 SO 4 → Br 2 + SO 2 + 2 H 2 O. The acid may be prepared by: reaction of bromine with ...
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In chemistry, a hydrobromide is an acid salt resulting, or regarded as resulting, from the reaction of hydrobromic acid with an organic base (e.g. an amine). The compounds are similar to hydrochlorides. Some drugs are formulated as hydrobromides, e.g. eletriptan hydrobromide.
The effect of hydrobromic acid on a mixture of potassium bromide with rhenium(VI) oxide: [3] ReO 2 + 2KBr + 4HBr → K 2 ReBr 6 + 2H 2 O. Reduction of potassium perrenate by potassium iodide in concentrated hydrobromic acid: [3] 2KReO 4 + 6KI + 16HBr → 2K 2 ReBr 6 + 4KBr + 3I 2 + 8H 2 O
LiBr is prepared by treating an aqueous suspension of lithium carbonate with hydrobromic acid or by reacting lithium hydroxide with bromine. [9] It forms several crystalline hydrates, unlike the other alkali metal bromides. [10]
Hydrobromic acid forms an azeotrope with boiling point 124.3 °C at 47.63 g HBr per 100 g solution; thus hydrobromic acid cannot be concentrated beyond this point by distillation. [ 3 ]
Magnesium bromide can be synthesized by treating magnesium oxide (and related basic salts) with hydrobromic acid. [3] It can also be made by reacting magnesium carbonate and hydrobromic acids, and collecting the solid left after evaporation. [2] As suggested by its easy conversion to various hydrates, anhydrous MgBr 2 is a Lewis acid.