CMC is a critical micelle concentration associated with surfactant molecules and forms micelles. ... Hence at CMC or critical micelle concentration and krafts temperature the surfactant molecules associate and form micelles. These micelles help in removing dirt, grease, dirt, etc from clothes.

What happens to the surface molecules at CMC?

The CMC corresponds to surface saturation thus rapidly leading to the formation of micellar aggregates in the bulk. The molecules will be present as monomers in the solution and adsorbed at the surfaces present (air/water; container/water).

What happens at CMC?

The CMC is an important characteristic of a surfactant. Before reaching the CMC, the surface tension changes strongly with the concentration of the surfactant. After reaching the CMC, the surface tension remains relatively constant or changes with a lower slope. ... Micelles only form above critical micelle temperature.