Surface ChemistryHard
Question
The following experimental data is obtained for the osmotic pressure of the solution by adding different moles of C17H35COONa in sufficient water to get 1.0 L solution in each case.
Moles of C17H35COONa 0 0.01 0.02 0.03 0.04
(π/RT) moles/litre 0 0.02 0.04 0.058 0.076
Select the correct information(s) regarding the nature of solution.
Options
A.At 0.02 M concentration, the solution behaves as true
B.At 0.04 M concentration, the solution behaves as colloidal
C.The critical micelle concentration (CMC) of C17H35COONa is in between 0.02 M and 0.03 M.
D.At 0.05 M concentration, the mixture of C17H35COONa and water will be homogeneous.
Solution
$RCOONa \rightleftharpoons RCOO^{-} + Na^{+}$
As true solution, one mole of RCOONa will become two moles in solution. But, as micelle formation starts, the total number of particles start decreasing due to association.
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