Equilibrium constant for ionic reactions

K is the true dissociation constant of the electrolyte and is independent of composition because of the characteristics of the It is only equal to the apparent dissociation constant 

Similar considerations apply when the dissociating species is itself an ion. For example, in a solution of carbonic acid there are the 

The first and second dissociation constants are given by the relations 

The temperature coefficient of InZ may be obtained by differentiation of equation (10 48) and application of equation (10 40). The results are equivalent to those already obtained in 10 4. For example, the temperature coefficient of the dissociation equilibrium discussed above is given by ginj  

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