6. Calculate surface activity of the surfactant using surface tension value of its aqueous solutions at 298 K. Calculate and draw the Gibbs adsorption isotherm (OH20, 71,96 mJ/m²) 7,8 15,6 62,5 500 61,5 C₂ mmol/1 0₂ mJ/m² 69,6 68,0 31,2 65,1 125 56,2 250 49,7 41,5

Fig: 1