Overview:(sour,bitter)Taste-→Arrhenius theory(酸碱电离理论， Ht&OHr),→Solvent theory,,Bronsted theory(质子理论)，Lewis theory(电子理论)，soft-hard acid/,base theory. 8.1.1 The Bronsted theory of acids and bases(酸碱质子理论) acid:a substance capable of donating a proton.(proton donor) (质子的给予体) base:a substance that can accept a proton.(proton acceptor) (质子的接受体) acid: a substance capable of donating a proton. (proton donor) （质子的给予体） base: a substance that can accept a proton. (proton acceptor) （质子的接受体） 8.1.1 The Brønsted theory of acids and bases (酸碱质子理论） Overview: (sour, bitter) Taste Arrhenius theory(酸碱电离理论, H+&OH- ),  Solvent theory, Bronsted theory(质子理论), Lewis theory(电子理论), soft-hard acid/base theory…