124. Solving a chemistry problem
262. With an increase in the concentration of isobutyric acid solution from 0.125 mol / l to 0.250 mol / l, its surface tension decreased from 55.1 mN / m to 47.9 mN / m, and for a solution of isovaleric acid - from 43.2 mN / m up to 35.0 mN/m. Compare the adsorption values of substances in a given concentration range at T = 293 K.
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