Schulze-Hardy rule

{
  "id": "MLC-T-CHM-010577",
  "term": "Schulze-Hardy rule",
  "field": "Chemistry",
  "definition": "A principle stating that the coagulating power of an electrolyte on a colloidal dispersion increases sharply with the valency of the ion carrying the opposite charge to that of the colloidal particles. For example, a trivalent ion is far more effective at causing coagulation than a monovalent ion. This rule is explained by the greater ability of higher-valent ions to compress the electrical double layer around colloidal particles.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "coagulation",
    "agglomeration",
    "counter-ions",
    "lyophilic",
    "valence"
  ],
  "references": [
    "PAC, 1972, 31, 577. 'Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry' on page 610 (https://doi.org/10.1351/pac197231040577)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/schulze-hardy-rule/"
}