von Weimarn ratio

synonym: relative supersaturation
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:
  1. The units of the quantities Q and S must be the same.
  2. 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.
Source:
PAC, 2025, 97, 137. (Glossary of terms for mass and volume in analytical chemistry (IUPAC Recommendations 2024)) on page 9 [Terms] [Paper]
Citation: 'von Weimarn ratio' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.09056 RIS BibTex EndNote
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