Ci

COOH Acid 1

Base 2

COO" Base 1

Salts of weak acids or bases are essentially completely ionised in solution. For example, ephedrine hydrochloride (salt of the weak base ephedrine, and the strong acid HCl) exists in aqueous solution in the form of the conjugate acid of the weak base, C6H5CH(OH)CH(CH3) N +H2CH3, together with its Cl0 counterions. In a similar manner, when sodium salicylate (salt of the weak acid salicylic acid, and the strong base NaOH) is dissolved in water, it ionises almost entirely into the conjugate base of salicylic acid, HOC6H5COO0, and Na + ions.

The conjugate acids and bases formed in this way are, of course, subject to acid-base equilibria described by the general equations above.

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