(1)HAc H+ + Ac-
Ka==[H+][Ac-]/[HAc]---[HAc]==[H+][Ac-]/Ka
(2)Ac- + H2O HAc + OH-
Kh==[HAc][OH-]/[Ac-]
(3)将[HAc]==[H+][Ac-]/Ka 代入 Kh==[HAc][OH-]/[Ac-]
(4)Kh==[H+][Ac-][OH-]/[Ka][Ac-]
Kh==Kw/Ka
(1)HAc H+ + Ac-
Ka==[H+][Ac-]/[HAc]---[HAc]==[H+][Ac-]/Ka
(2)Ac- + H2O HAc + OH-
Kh==[HAc][OH-]/[Ac-]
(3)将[HAc]==[H+][Ac-]/Ka 代入 Kh==[HAc][OH-]/[Ac-]
(4)Kh==[H+][Ac-][OH-]/[Ka][Ac-]
Kh==Kw/Ka