Editing Solubility (section)

===Conversion of solubility values===

Conversion between these various ways of measuring solubility may not be trivial, since it may require knowing the density of the solution — which is often not measured, and cannot be predicted. While the total mass is conserved by dissolution, the final volume may be different from both the volume of the solvent and the sum of the two volumes.<ref name=lee2012>I. Lee and J. Lee (2012): "Measurement of mixing ratio and volume change of ethanol-water binary mixtures using suspended microchannel resonators". ''SENSORS'', volume 2012, pages 1-3. {{doi|10.1109/ICSENS.2012.6411272}}.</ref>

Moreover, many solids (such as [[acid]]s and [[salt (chemistry)|salts]]) will [[dissociation (chemistry)|dissociate]] in non-trivial ways when dissolved; conversely, the solvent may form [[coordination complex]]es with the molecules or ions of the solute. In those cases, the sum of the moles of molecules of solute and solvent is not really the total moles of independent particles solution. To sidestep that problem, the solubility per mole of solution is usually computed and quoted as if the solute does not dissociate or form complexes—that is, by pretending that the mole amount of solution is the sum of the mole amounts of the two substances.