Activity coefficient potassium hydroxide

For aqueous potassium hydroxide (10 M) the value of the observed rate coefficient is 226 I.mole Fsec at 0.1 °C. Over the temperature range 0.1 to 20.6 °C an activation energy of 6.0 kcal.mole was calculated. At zero cation concentration ko (0.1 °C), obtained by extrapolation, has a value of 6.0 l.mole . sec with an associated activation energy and entropy of 9.1 kcal.mcle and — 24 cal.deg. mole respectively. 

Literature data (Robinson and Stokes, 1959) for the activity and osmotic coefficients of potassium hydroxide and sodium hydroxide solutions, at 25 C, are listed in Table 2.4. The activity and osmotic coefficients of each of these alkali hydroxides have been fitted simultaneously using Eqs. (2.63) and (2.64), respectively (to keep the uncertainty in each point similar, a weight of has been used where X is the measured value). The fits obtained are illustrated in Figures 2.1 and 2.2. From these fits, the values obtained for the ion interaction parameters are... 

Table 2.4 Osmotic and activity coefficient data (Robinson and Stokes, 1959) for potassium and sodium hydroxide solutions at 25 °C.

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