b.水的质子自递反应： H20+H20≥H3O++OH (25°C) Kw=a(H)a(0H)=1.00x10-4 共轭酸碱对(HA-A一)的K与K的关系为： k-lgaa）- a灯 a(A) pKa+pkp pKw =14.00 5 5 b. 水的质子自递反应: H2O + H2O H3O+ + OH- (25°C) p p p 14.00 K K K a b w + = = 14 w K a a (H ) (OH ) 1.00 10 + − − =  =  + - a b w - (H ) (A ) (HA) (OH ) (HA) (A ) a a a a K K K a a −   =  = 共轭酸碱对(HA-A－)的Ka与Kb的关系为 :