Parabolic kinetics solution composition

The fourth explanation for non-linear kinetics differs from the previous three in that it concerns the composition of the solution rather than any intrinsic property of the solid reactants or products. Changing solution composition can produce apparent or true parabolic dissolution kinetics either through the influence of changing pH and COj equilibria, or through the effect of chemical affinity and the reverse reaction rate. These phenomena have been discussed in detail by Helgeson and Murphy (V7) and Helgeson and others ( 1 8). 

Solution Composition. Changing solution composition can also cause apparent or true parabolic dissolution kinetics through the influence of changing pH and C02 equilibria or through an effect on chemical affinity and reverse rate (Helgeson et al., 1984). 

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