what gas is given off by concentrated hydrochloric acid
Hydrogen chloride The compound hydrogen chloride has the chemical formula HCl and as such is a hydrogen halide. At room temperature, it is a colorless gas, which forms white fumes of hydrochloric acid upon contact with atmospheric water vapor. Hydrogen chloride gas and hydrochloric acid are important in technology and industry. Hydrochloric acid, the aqueous solution of hydrogen chloride, is also commonly given the formula HCl.
Hydrochloride Converting insoluble amines into hydrochlorides is a common way to make them water-soluble. This characteristic is particularly desirable for substances used in medications.[1] The European Pharmacopoeia lists more than 200 hydrochlorides as active ingredients in medications.[2] These hydrochlorides, compared to free bases, may more readily dissolve in the gastrointestinal tract and be able to be absorbed into the bloodstream more quickly. In addition, many hydrochlorides of amines have a longer shelf-life than their respective free bases