... K, = [HC],/[P-][CH3COOH]" (2) where [HC], = P-.-[HOOCCH3],, n = 1, 2, 3, .... Since the composition of [HC], would alter as a function of acid added, 0003-2700/83/0355-2184$01.50/0 0 1983 American Chemical Society Page 2. ANALYTICAL CHEMISTRY, VOL. 55, NO. ...