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Acid – Base Definitions versus H

1substance that [OH ]in waterAcid base DefinitionsArrheniusacid: base :substance that [H+](protons) in wateracid:Br nsted-Lowryprotondonor(to base )protonacceptor(from acid ) base :Johannes ThomasSvante1923 Gilbert N. acid : base :e pairacceptor(from a base )e pairdonor(to an acid )1923 Lewis1884HA(aq)+ H+(aq)A (aq)notHA(aq)+ H3O+(aq)+ H2O( )A (aq)H3O+ versus H+B-Ldefinition x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 14pH = < > [H3O+]pH[OH ]pHH+= < = log[H3O+][H3O+] = 10 pH log+ pOH= pHpKwS ren S rensenDanish(1868-1939)[H3O+] = x 10 9 MpH = = [H3O+] = 10 x 10 6 MpH0123456789101112 Alizarian yellow RThymolphthaleinPhenolphthaleinThymol blue ( base )Phenol redBromothymol blueChlorophenol redBromocresol greenMethyl orangeBromophenol blueThymol blue ( acid )

Acid – Base Definitions Arrhenius acid: base: substance that [H+] (protons) in water acid: Brønsted-Lowry proton donor (to base) base: proton acceptor (from acid) Johannes Thomas ... 8.00 1.0 x 10 –8 1.0 x 10 –7 1.0 x 10 –6 1.0 x 10 –6 1.0 x 10 –7 1.0 x 10 –8 0.00 1.0 x 10 –14 1.00 2.00 3.00 1.0 x 10 –13 1.0 x 10 –12 1.0 x ...

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