135. Solving a chemistry problem
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Product description
Option 3.
Based on the experimental data obtained in the study of the surface tension of the indicated aqueous surfactant solution at 20°C, calculate the area occupied by one surfactant molecule and the thickness of the adsorption monolayer in two ways: graphical and
analytical. For this:
Analytical method
- Calculate the average value of the Cav concentration, the values of ∆С, ∆σ and ∆σ/∆С.
- Calculate the amount of adsorption Г according to the equation Г= С av / RT(Δσ/ΔС) .
- Calculate the S/G values and plot the adsorption isotherm in linear coordinates using the Langmuir equation S/G = f(S)
- Determine graphically the values of G∞ and K.
- Calculate So and δ.
Option 3. Surfactant - heptanol
С•103, mol/dm3 0.0 0.04 0.100 0.200 0.316 0.500 0.794 1.000
σ•103, J/m2 72.75 71.40 70.90 70.00 69.20 68.20 67.20 66.80
Additional information
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