Dissociation of lanthanum cobalticyanide

We shall calculate the degree of dissociation of lanthanum cobalticyanide by making the foUowing postulates — 

Denoting the charge on the ions by =3 and the degree of dissociation of lanthanum cobalticyanide by a, and noting that the ionic strength I is equal to zac, we obtain 

At each concentration a can be calculated from equation (1) by a short series of successive approximations. 

The equivalent conductance of lanthanum cobalticyanide at infinite dilution is 

Incomplete dissociation of electrol3rtes of high valence tj pe has been widely postulated to account for negative de dations from Onsager s equation and semi-empirical extensions of it (see Davies, Endeavour, 1945,4,114). In many cases independent values of are not available, so that both and K have to be determined from the same data. 

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