Activity coefficient

{
  "id": "MLC-T-CHM-000197",
  "term": "Activity coefficient",
  "field": "Chemistry",
  "definition": "A dimensionless factor that relates the activity of a chemical species to its concentration in a solution, quantifying the deviation from ideal behavior. It accounts for the non-ideal interactions between molecules in a real solution, which affect the chemical potential. For an ideal solution, the activity coefficient is equal to one.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "chemical potential",
    "coefficient",
    "mole"
  ],
  "references": [
    "PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2171 (https://doi.org/10.1351/pac199062112167)",
    "PAC, 1994, 66, 533. 'Standard quantities in chemical thermodynamics. Fugacities, activities and equilibrium constants for pure and mixed phases (IUPAC Recommendations 1994)' on page 543 (https://doi.org/10.1351/pac199466030533)",
    "PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 960 (https://doi.org/10.1351/pac199668040957)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/activity-coefficient/"
}