I was looking at an effect of solubity of PbI2 when it's mixed with AVA (aminovaleric acid) and CH3NH3I (methylammonium iodide) in DMS . Provided that PbI2 has its own Ksp in water at 25 °C . How can I get this value in a non aqueous medium ?
Dear Sir. Concerning your issue about the Ksp in aprotic polar solvent . The solubility of solutes in mixed solvents depends primarily on the solvation of the solutes or their constituent ions by the components of the solvent mixtures. Complications may arise if different crystal solvates are formed or if solute-solute interactions are appreciable. In their absence the standard molar Gibbs energies of solution measure the corresponding quantities of solvation, ASOIVG' , or transfer , AtrG'. The preferential solvation of solutes is described by the composition dependence of AtrG' and is analyzed in terms of the quasi-lattice quasi-chemical (QLQC) or the inverse Kirkwood- Buff integral (IKBI) methods. These relate AtrG' to the solvation in the two neat solvents, and in turn to certain properties (polarity, hydrogen-bonding ability, size) of the solvents. These considerations are illustrated by several cases, involving salts and non-electrolytes. Aprotic solvents may have hydrogens on them somewhere, but they lack O-H or N-H bonds, and therefore cannot hydrogen bond with themselves. I think the following below links may help you in your analysis:
https://pdfs.semanticscholar.org/228a/0857ea5290ee0dbc57da2619bfddbfbd7df9.pdf
https://www.masterorganicchemistry.com/2012/04/27/polar-protic-polar-aprotic-nonpolar-all-about-solvents/
http://rcas.sinica.edu.tw/~gchu/images/pdf/2015/c4ta06392a.pdf
https://bibliotecadigital.ipb.pt/bitstream/10198/1505/3/18%20IECR1994.pdf
Thanks
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