9. Using the constants of the Shishkovsky equation: a

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9. Using the constants of the Shishkovsky equation: a = 12.6 · 10 -3,
b = 21.5, calculate the surface tension for aqueous solutions of butyric acid (at T = 273 K) for the following concentrations (kmol / m 3): 0.007; 0.021; 0.05; 0.104 and plot the graph in the coordinates σ = f (C); the surface tension of the water is assumed equal to σ 0 = 75.49 · 10 -3 N / m.

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Questions and problems from the manual:
"Laboratory Workshop on Colloid Chemistry" Nekrasov AP, Veretenchenko BA, Kharkov NTU "KhPI", 2004
"Characteristic properties of disperse systems" Nekrasov AP, Kharkov, 1996
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