79. Solving a chemistry problem
103. At 25 C, the surface tension of aqueous solutions of propionic acid depends on its molality as follows
s, mol/kg H2O 0.263 0.837 1.466 3.741
b, mN/m 60.0 49.0 44.0 36.0
Plot b versus lnc and determine from it the excess surface concentration G. Find the area per molecule of acid.
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