K1-24 When measuring the surface tension of water races

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24. In the measurement of the surface tension of water solutions of propionic acid at T = 293 K were obtained the following values:

Concentration C, mol / dm3 0.24 0.95 0.1 0 2.0
Surface tension σ⋅103, N / m 73.3 65.5 60.0 45.7 38.8

Based on these data graphed σ = f (C) and T = f (C). Determine the equation of Langmuir constants K and G∞.

Additional information

Tasks of metodichek:
"Laboratory workshop on colloid chemistry" Nekrasov AP Veretenchenko BA, Kharkiv NTU "KPI", 2004
"Characteristic features of disperse systems" Nekrasov, AP, Kharkiv, 1996
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