System sodium dehydrocholate – hexadecyltrimethylammonium bromide in aqueous medium.
Nonideal and asymmetric behavior result from very different surfactant structures.
Affinity of DHC− for HTAB micelles is stronger than that of HTA+ for NaDHC ones.
Mixture composition with minimum total free energy has minimal ionization degree.
EOMMM asymmetric for realistic analysis when surfactant structure is very different.