Calculate the surface activity –dσ/dC at C=0 of a valeric acid solution at 18 degrees using Shishkovsky's empirical equation, knowing its coefficients A=0.0150 mol/l, B=0.178. The surface tension of the solvent (water) is 72.4 mN/m.

If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.