5. Using the surface tension value of sodium dodecyl sulphate aqueous solutions at 293 K. Calculate the Gibbs adsorption and draw the Gibbs adsorption isotherm. Calculate the surface activity of this surfactant and critical micellization concentration (OH20=72,75 mJ/m²) Csurfactant 2,16 mmol/1 6. mJ/m² 62 3,96 54 6,6 47 8,3 23 9,3 42 9,8 41 10,2 41 11,2 41

Fig: 1