Determination of Ion Interaction Parameters for KOH at Temperatures Other than

Determination of Ion Interaction Parameters for KOH at Temperatures Other than 25 °C 

As indicated in the previous section, the ion interaction parameters i(K, OH ) and 2(K OH ) have been used, at 25 C, as the starting point for the calculation of other ion interaction parameters. The same strategy will also be used for other temperatures. Activity coefficient data for other temperatures have been provided by Li and Pitzer (1996) and are reproduced here in Table 2.5 but in the moles per kilogram scale rather than mole fraction. 

Values for the ion interaction coefficients were obtained at each of the temperatures listed in Table 2.5 by fitting Eq. (2.63). The values obtained are listed in Table 2.6 together with the values calculated at 25 C that were determined in the previous section. 

The data in Table 2.6 were then fitted to the following equation to determine the temperature-dependent ion interaction parameters for KOH  

---