https://doi.org/10.1351/goldbook.09056
Difference between the concentration of the supersaturated solution (see supersaturation) required for nucleation (\(Q\)) and its solubility (\(S\)), divided by the solubility, \((Q − S)/S\).
Notes:
- The units of the quantities \(Q\) and \(S\) must be the same.
- The particle size of a precipitate increases as its relative supersaturation decreases, so \(Q\) should be kept low and \(S\) should be high during gravimetric analysis by precipitation.