23. Determine at what concentration of valerianic acid in an aqueous solution at 353 K the surface tension of the solution will be reduced to the value indicated below. Constants of the Shishkovsky equation: B = 17.7 * 10-3 J / m2, A = 19.72 l / mol. The surface tension of water at 353 K is 63 * 10-3 J / m2.
Problem N23
b * 103 J / m2 55.9

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