Solubilization

• For middle phase microemulsion,

1 mol CaCl₂ 16-19 moles of NaCl

and for oil-external microemulsions,

1 mol CaCl₂ 4 moles of NaCl

• Values of optimal salinity:

LiCl > NaCl > KCl > NH4Cl

At phase inversion, partition coefficient is near unity.

• Repulsion forces between micelles decreases due to the neutralization of surface charge of micelles by counterions.