https://doi.org/10.1351/goldbook.I02938
A mixture of substances B, C, ... is called an ideal mixture when aB=xB, aC=xC, ... or fB=1, fC=1 where aB and fB are the
relative activity
and the
activity coefficient
, respectively, of a substance B in a liquid or solid mixture.
Source:
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 [Terms] [Paper]