Hydrolysis of (CH3)3Sn+ in various salt media

The hydrolysis of trimethyltin(IV) has been studied by potentiometry (H(+) -glass electrode) and calorimetry in various salt media (NaNO(3), NaCl, KCl, Na(2)SO(4), and NaNO(3)-NaCl mixtures). The effect of ionic strength on the hydrolysis constants is accounted for by a simple Debye-Hiickel type equation and by Pitzer equations. The results allow us to obtain Delta H for hydrolysis and the temperature dependence of the Pitzer parameters. The resulting coefficients can be used to examine the speciation of (CH(3))(3)Sn(+) in multicomponent electrolyte solutions, such as natural waters, over a wide range of temperature and ionic strength.