Molar conductivity left(Lambda_mright) of an | vedclass

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(A) Sodium stearate is a surfactant that behaves as a strong electrolyte at low concentrations. As the concentration increases,the molar conductivity

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(A) Sodium stearate is a surfactant that behaves as a strong electrolyte at low concentrations. As the concentration increases,the molar conductivity $\left(\Lambda_m\right)$ decreases due to the interionic attractions,similar to other strong electrolytes. However,once the concentration reaches the Critical Micelle Concentration $(CMC)$,the individual ions aggregate to form large,bulky micelles. These micelles have a much lower mobility compared to individual ions,leading to a sharp decrease in the rate of change of molar conductivity with respect to $\sqrt{c}$ after the $CMC$ point. This results in a plot where the slope changes significantly at the $CMC$,which is best represented by the graph in option $A$.

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