PSI Barbering Practice Exam

Emulsification is the correct choice because it is a chemical process that involves the combination of two immiscible liquids, typically oil and water, to create a stable mixture known as an emulsion. In this process, one liquid is dispersed throughout the other in the form of tiny droplets, allowing them to coexist in a uniform mixture. Emulsifiers or surfactants are often used to stabilize the emulsion by reducing the surface tension at the interface between the two liquids, preventing them from separating.

Other processes listed do not involve combining two liquids that do not mix. Distillation is used for separating components of a solution based on their boiling points. Filtration involves separating solids from liquids or gases using a barrier, allowing the desired phase to pass through. Precipitation refers to the formation of a solid from a solution when the concentration of a solute exceeds its solubility, typically after a chemical reaction has occurred. Thus, emulsification is specifically recognized for its ability to mix normally unmixable liquids, making it the appropriate answer.