Chemistry

Problem

A soap of sodium stearate in solution starts micellisation at

1.2 \times 10^{-3} M

. A colloidal (micelle) particle, on an average contains

2.4 \times 10^{13}

molecules of soap in

1 \text{ mm}^3

. The average number of anions (stearate ions) is : a. 120 b. 90 c. 60 d. 30