1 Surface Chemistry
Which of the following forms cationic micelles above certain concentrations?
1) Sodium dodecyl sulphate 2) Urea 3) Sodium acetate 4) Cetyl trimethyl ammonium bromide
Sodium dodecyl sulphate and sodium acetate form anionic micelles due to larger size anions. Alkyl trimethyl ammonium ion aggregates to form a cationic micelle.
The reaction is as follows:
R(CH3)3NBr → R(CH3)3N+ + Br−
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