Question

What is CMC and Kraft temperature?

Answer 1

Critical Micelle Concentration

• Critical Micelle Concentration (CMC) is the concentration above which micelle formation occurs.
• The minimum quantity of surfactant needed to lower the maximum surface tension of water is determined using CMC.

Example of Critical Micelle Concentration

• The value of CMC for sodium dodecyl sulfate in water at $25°\text{C}$, atmospheric pressure, is $8\text{x}{10}^{-3}{\text{molL}}^{-1}$.

Kraft Temperature

• The term "Kraft Temperature" refers to the temperature at which a surfactant's solubility is equal to its critical micelle concentration.
• Kraft Temperature is also called critical micelle temperature or Kraft point.

Example of kraft temperature

• Above the kraft temperature, the aqueous solution of detergents starts boiling.