NSCI 1322 Lecture Notes - Lecture 45: Nucleon, Conjugate Acid, Alkali Metal
12 Jan 2017
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In 1923 the danish chemist johannes n. br nsted (1879 1947) and, independently, the. British chemist thomas m. lowry (1874 1936) pointed out that acid base reactions can be seen as proton-transfer reactions and that acids and bases can be defined in terms of this proton transfer. According to the br nsted lowry concept, an acid is the species donating a proton in a proton-transfer reaction. A base is the species accepting the proton in a proton-transfer reaction. A proton is a nuclear particle with a unit positive electrical charge; it is represented by the symbol h+ because it constitutes the nucleus of a hydrogen atom. According to the br nsted lowry scheme a substance can function as an acid only in the presence of a base; similarly, a substance can function as a base only in the presence of an acid.
