Acidity R-0-H+H,ǒ：←→ R-0 +H,0*K1016 pK.=16 alcohol alkoxide R-C-0-H+H,0:→ R-C +HO+ pK=5 (Kn≡10-5 acid O: carboxylate R一O- H3O+ R-OH +H2O R 00 HO+ K8Jau3 R一COOH+HO stabilization of carboxylate => Chapter 20 11Chapter 20 11 Acidity =>