Determination of Temperature-Dependent Parameters

Determination of stability constants at temperatures other than 25 °C requires an expression to predict the values of the Debye-Hiickel constants, A and B (given in Eqs. (2.44) and (2.45), respectively), as well as the ion size parameter, Uj (Eq. (2.43)). The values of A and B can be determined using multiple regression with an equation of the form 

Tabie 2.2 Caicuiated vaiues of the Debye-Huckei parameters A and B using a muitipie regression equation. 

Calculated values of the ion size parameter, y, are in accord with Oelkers and Helgeson (1990) and are listed in Table 2.3. The variation of y is given by 

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