The acid dissociation constant, Ka gives a measure of the extent of the dissociation. For example ,we find no data on the basic dissociation of ammonia (nor for any other bases). For the reaction in which the acid HA dissociates to form the ions H + and A-: HA H + + A- carbonic acid or phosphoric acid) show several dissociation constants, because more than one proton can be separated (one after the other): H 3 A \(\rightleftharpoons\)H + + H 2 A- Formula agents. Reference table of General and inorganic chemistry contains the name and formula of the hydroxide and acid, and the corresponding dissociation constants. Chemical formulas or structural formulas are shown for the fully protonated weak acid. There are tables of acid dissociation constants, for easy reference. The acid dissociation constant is the equilibrium constant of the dissociation reaction of an acid and is denoted by K a. Ka. Dissociation constants of inorganic bases (Table) Hydroxide. Polyprotic acids (e.g. Acid. Dissociation constants of acids and bases inorganic Details Category: chemistry. Instead, we find the acid dissociation constant for the conjugate acid, ammonium ion. In some cases—such as acetic acid—the compound is the weak acid. DISSOCIATION CONSTANTS OF ORGANIC ACIDS AND BASES This table lists the dissociation (ionization) constants of over 1070 organic acids, bases, and amphoteric compounds. Dissociation constants, K in. K a is commonly expressed in units of mol/L. These constants are only useful for weak acids. If Ka is a large value then the acid is strong and dissociates into ions easily. An acid dissociation constant, denoted by K a, is an equilibrium constant for the dissociation of a weak acid.According to the Brønsted-Lowry theory of acids and bases, an acid is a proton donor (HA, where H represents an acidic hydrogen atom), and a base is a proton acceptor.In aqueous solution, water can function as a base, as in the following general example. Many compilations of equilibrium constant data list only acid dissociation constants because it is so easy to calculate dissociation constants for bases by using Equation 9-14. This equilibrium constant is a quantitative measure of the strength of an acid in a solution. In other cases—such as for the ammonium ion—the neutral compound is the conjugate base. The table is intended for pupils and students. Weak acids are arranged alphabetically by the names of the neutral compounds from which they are derived. Acid Dissociation Constants (K a) Key Concepts. K a, the acid dissociation constant or acid ionisation constant, is an equilibrium constant that refers to the dissociation, or ionisation, of an acid. Dissociation Constants Of Organic Acids And Bases: This table lists the acid-base dissociation constants of over 600 organic compounds, including many amino acids. The greater the dissociation constant of an acid the stronger the acid.