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HCl is hydrochloric acid. It is a strong acid. All of the mineral acids like HBr, HI, H2SO4, and HNO3 are strong acids. The pH of most any strength of an HCl solution is 1 since HCl completely dissociates into H+ and Cl-. Since it completely ionizes in water, it is not a weak acid but a strong acid. It is not a base at all, weak or strong. It is also not a salt. Even though it is composed of two ions, HCl is not considered a salt because the term salt is usually used to describe a compound made of ions that forms a solid in the absence of solvent. In the absence of any water, hydrogen chloride (HCl) is actually a gas.
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