Hydrogen Bromide

Hydrogen bromide can be confusing to most non-experts and even to some professional inexperienced chemists because of its inaccuracies. But most chemists who are considered an authority on the subject and are experienced in dealing with hydrogen find it easy to understand and predict its behavior. Hydrogen bromide is a diatomic molecule - which means it’s a pure molecule that’s made up of just two atoms made up of the same or two different elements. There are only seven diatomic elements in existence, they are hydrogen, oxygen, nitrogen, chlorine, fluorine, iodine and of course bromine.

The molecular formula for this diatomic molecule is HBr. It’s an irritating colorless gas and at room temperature is nonflammable. It dissolves in water very easily and when just over 68% of HBr by weight makes contact with water it creates a hydrobromic acid solution. When it is constantly boiling it’s an aqueous solution that starts to distill at around 124 degrees Celsius. An aqueous solution is any solution in which water is the solvent. An example of an aqueous solution would be saltwater, rain or even cola. Fuming in moist air at room temperature gives off an acrid odor which is very noticeable.

Although hydrogen bromide is made on a much smaller scale industrially than in chemical laboratories, hydrogen and bromine are usually combined at temperatures between 200 – 400 degrees Celsius. To accelerate this reaction platinum or asbestos may be added to the solution. HBr is used in many ways. The most common use of HBr is in the production of alkyl bromides from alcohol. This is only a small part of a much larger process in making hydrogen fuel cells which can gas hydrogen fuel cell vehicles. These types of vehicles are becoming more popular with the public and more interesting with chemists, auto makers, engineers and environmentalists. HBr is also used when making barbiturates and synthetic hormones.

Dealing with a diatomic molecule such as HBr is usually done with stereochemistry. Stereochemistry is an important division when it comes to studying molecules that lack an internal plane of symmetry and has a non-superposable mirror image. An example would be that the left hand is superposable to the right hand, this is probably the best example one could give. Stereochemistry is a subdiscipline of chemistry concerning mainly with atoms in molecules that have a spatial arrangement. Stereochemistry is also known as 3D chemistry. So, it wouldn’t be incorrect if one said that hydrogen bromide is manufactured by 3D chemists.

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