2. Calculate the surface tension of acetic acid solutions at 18 C and concentrations: 0 - 0.03 - 0.06 - 0.12 - 0.24 kmol / m3, if the surface tension of the solvent is 0.072 n / m, the constant "B" in the equation Shishkovsky is 15 m3 / kmol, the length of the surfactant molecule is 0.7 nm, the surfactant substance is 880 kg / m3. Build a graph: tension - concentration. Determine the maximum adsorption, the cross section of the molecule, its length, as well as surface activity and Gibbs adsorption at C = 0.03 kmol/m3.

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