Transcription of Acid – Base Definitions versus H
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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 )
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 ... Hydroazoic HN3 1.9 x 10–5 Hydrocyanic HCN 6.2 x 10–10 Hydrofluoric HF 6.8 x 10 –4 Hydrosulfuric H 2S 5.7 x 10–8 1.3 x 10…
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