[adquimico]

A little and too basic doubt, but I couldn't find answers yet...

In a solution, aqueous or non-aqueous, is necessary concentration of a surfactant be high enough to be equal or above the CMC to begin the formation of bubbles and/or foams through mechanical stirring?!?!? Can I observe bubbles or foam in a solution with surfactant concentration under the CMC?!

Thanks for your cooperation 

[adquimico]

A little and too basic doubt, but I couldn't find answers yet...

In a solution, aqueous or non-aqueous, is necessary the concentration of a surfactant be high enough to be equal or above the CMC to begin the formation of bubbles and/or foams through mechanical stirring?!?!? Can I observe bubbles or foam in a solution with surfactant concentration under the CMC?!

CMC = Critical Micellar Concentration

Thanks for your cooperation 

[ARGOS++]

Dear adquimico;

(Sorry, I haven’t realised your question till yet.)

Of course that you are able to recognise bubbles/foam “long” before you reach the CMC, because lower concentrations already lowers the "hydrophobia of air" quite before.

Have you also read:  http://en.wikipedia.org/wiki/Critical_micelle_concentration 


Good Luck!
                    ARGOS⁺⁺