Question

Ph dependent conductivity for zwitterionic surfactant

Answer 1

Answer:

Your surfactant contains sulfonate instead of carboxylate, it is known that the sulfonate groups are insensitive to the aqueous phase pH.i.e these groups are negatively charged in the pH range 2-13. On the other hand the amine groups of your surfactant are positively charged in the pH range 2-pKa of the corresponding ammonium. groups.Therefore at pH=3, a compensation of the positive charges with the negatively should occur, whereas at pH=7 the negative charges of the sulfonate groups exceed those of the ammonium groups, and at pH below 3, the positive charge of ammonium groups exceed those of sulfonate.

Answer 2

Explanation:

Zwitterionic Surfactants. Zwitterionic or amphoteric surfactants are surfactants that carry both a positive and a negative charge. As stated, these charges can either be permanent or dependent on the pH value.