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Classify each of the following surfactants as anionic, cationic, nonionic, or amphoteric.

CONCEPTUAL EXAMPLE 17.1. Classification of Surfactants. Solution. a. The N atom of the large, active part bears a positive charge; this is a cationic surfactant. (The counter ion is Cl – .)

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Classify each of the following surfactants as anionic, cationic, nonionic, or amphoteric.

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  1. CONCEPTUAL EXAMPLE 17.1 Classification of Surfactants Solution a. The N atom of the large, active part bears a positive charge; this is a cationic surfactant. (The counter ion is Cl–.) b. There is a negative charge on the group of the active part, making this an anionic surfactant. (The counter ion is Na+) c. This substance has both a positive charge (on the N atom) and a negative charge (on the COO– group), making this an amphoteric detergent. d. This substance has neither a positive charge nor a negative charge; it is a nonionic surfactant. Exercise 17.1 Classify each of the following surfactants as anionic, cationic, nonionic, or amphoteric. a. CH3(CH2)8—C6H4—O(CH2 CH2O)9Hb. CH3(CH2)14COO–K+c. CH3(CH2)9—C6H4 —SO3–Na+d. CH3(CH2)12CH2N+(CH3 )3Cl– Classify each of the following surfactants as anionic, cationic, nonionic, or amphoteric. a. CH3(CH2)14CH2N+(CH3)3Cl–b. CH3(CH2)13O(CH2CH2O)7SO3–Na+c. CH3(CH2)12CH2NH2+CH3COO–d. CH3(CH2)12CON(CH2 CH2 OH)2

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