Among the following surfactant that will form micelles in aqueous solution at the lowest molar concentration at ambient conditions is

Question

Among the following surfactant that will form micelles in aqueous solution at the lowest molar concentration at ambient conditions is (A) CH3(CH2)15N+CH3Br- (B) CH3(CH2)11OSO-3Na+ (C) CH3(CH2)6COO-Na+ (D) CH3(CH2)11N+(CH3)3Br-

Tardigrade Admin · Accepted Answer

Larger the hydrophobic fragment of surfactant, easier will be the micellisation, smaller the crticial micelle concentration. Therefore, CH3(CH2)15N+ (CH3)3Br- will have the lowest crticial micelle concentration.

Q. Among the following surfactant that will form micelles in aqueous solution at the lowest molar concentration at ambient conditions is

$C H_{3} (C H_{2})_{15} N^{+} C H_{3} B r^{-}$

$C H_{3} (C H_{2})_{11} OS O_{3}^{-} N a^{+}$

$C H_{3} (C H_{2})_{6} CO O^{-} N a^{+}$

$C H_{3} (C H_{2})_{11} N^{+} (C H_{3})_{3} B r^{-}$

Larger the hydrophobic fragment of surfactant, easier will be the micellisation, smaller the crticial micelle concentration. Therefore, $C H_{3} (C H_{2})_{15} N^{+} (C H_{3})_{3} B r^{-}$ will have the lowest crticial micelle concentration.

Q. Among the following surfactant that will form micelles in aqueous solution at the lowest molar concentration at ambient conditions is

CH3​(CH2​)15​N+CH3​Br−

CH3​(CH2​)11​OSO3−​Na+

CH3​(CH2​)6​COO−Na+

CH3​(CH2​)11​N+(CH3​)3​Br−

Larger the hydrophobic fragment of surfactant, easier will be the micellisation, smaller the crticial micelle concentration. Therefore, CH3​(CH2​)15​N+(CH3​)3​Br− will have the lowest crticial micelle concentration.

$C H_{3} (C H_{2})_{15} N^{+} C H_{3} B r^{-}$

$C H_{3} (C H_{2})_{11} OS O_{3}^{-} N a^{+}$

$C H_{3} (C H_{2})_{6} CO O^{-} N a^{+}$

$C H_{3} (C H_{2})_{11} N^{+} (C H_{3})_{3} B r^{-}$

Larger the hydrophobic fragment of surfactant, easier will be the micellisation, smaller the crticial micelle concentration. Therefore, $C H_{3} (C H_{2})_{15} N^{+} (C H_{3})_{3} B r^{-}$ will have the lowest crticial micelle concentration.