4.1 When studying the surface activity of acetic acid solutions at 20 C, the following results were obtained:
acid concentration, mol/l 0.00 0.01 0.60 0.70 1.10
σ •103, N/m 73.25 70.02 60.60 59.70 56.70
Calculate the adsorption values and areas occupied by one acetic acid molecule at various concentrations.
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