Acidity function

{
  "id": "MLC-T-CHM-000141",
  "term": "Acidity function",
  "field": "Chemistry",
  "definition": "A measure of the acidity of a solvent system, particularly in highly concentrated acid solutions where the pH scale is no longer applicable. It quantifies the proton-donating ability of the medium. The Hammett acidity function, H0, is a commonly used example for strong acid solutions.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "acidity",
    "Lewis adduct",
    "amines",
    "hydron",
    "lyate ion"
  ],
  "references": [
    "PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1081 (https://doi.org/10.1351/pac199466051077)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/acidity-function/"
}