6. Calculate and plot the Gibbs adsorption isotherm using the surface tension of aqueous solutions of surfactants (sodium 8-hexadecyl sulfate) at 293 K. The surface tension of water is 72.75 mJ/m2.
Surfactant concentration, mmol/l 0.01 0.05 0.1 0.5 1.0 3.0
Surface tension, mJ/m2 64.1 55.6 52.4 41.2 36.4 30.0

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