General Description
At room temperature, HBr is a nonflammable gas with an acrid odor, fuming in moist air because of the formation of hydrobromic acid. HBr is very soluble in water, forming hydrobromic acid solution, which is saturated at 68.85% HBr by weight at room temperature. Aqueous solutions that are 47.6% HBr by weight form a constant-boiling mixture (reverse azeotrope) that boils at 124.3°C. Boiling less concentrated solutions releases H2O until the constant boiling mixture composition is reached.
Read more about this topic: Hydrogen Bromide
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