The formation of micelles (associated colloids) by surfactants like soaps and detergents occurs unde — Surface Chemistry Chemistry Question
Question
The formation of micelles (associated colloids) by surfactants like soaps and detergents occurs under strictly defined physical conditions. Which of the following statements correctly defines these thermodynamic conditions?
Answer: B
💡 Solution & Explanation
Surfactants behave as normal strong electrolytes at low concentrations. They aggregate to form micelles (associated colloids) only when two specific conditions are met simultaneously: the concentration must exceed the Critical Micelle Concentration (CMC), and the temperature must be above the Kraft temperature ($T_k$).
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