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In chemistry, an acid–base reaction is a chemical reaction that occurs between an acid and a base.It can be used to determine pH via titration.Several theoretical frameworks provide alternative conceptions of the reaction mechanisms and their application in solving related problems; these are called the acid–base theories, for example, Brønsted–Lowry acid–base theory.
A conjugate acid, within the Brønsted–Lowry acid–base theory, is a chemical compound formed when an acid gives a proton (H +) to a base—in other words, it is a base with a hydrogen ion added to it, as it loses a hydrogen ion in the reverse reaction.
A bilateral aviation safety agreement (BASA) is an agreement that provides for civil aviation certifications to be shared between two countries. [1]The European Aviation Safety Agency (EASA) currently maintains BASAs with the FAA, the Transport Canada Civil Aviation (TCCA), the National Civil Aviation Agency of Brazil (ANAC), [2] and the Civil Aviation Administration of China (CAAC).