Sircar and Myers [J. Phys. Chem., 74, 2828–2835 (1970)] measured liquid-phase adsorption at 30°C for a binary mixture of cyclohexane
(1) And ethyl alcohol 

(2) On activated carbon. Assuming no adsorption of ethyl alcohol, (15-34) gave these results:

(a) Plot the data as q^e₁ against x₁. Explain the shape of the curve.
(b) In what concentration region does the Freundlich isotherm fit the data? Make the fits.

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0.042 0.051 0.072 0.148 0.160 0.213 0.216 0.249 0.286 0.341 0.391 qi, mmol/g 0.295 0.485 0.517 0.586 0.669 0.661 0.583 0.595 0.532 0.383 0.192 0.440 0.470 0.521 0.537 0.610 0.756 0.848 0.893 0.920 0.953 0.974 ₁, mmol/g 0.065 0.000 -0.129 -0.362 -0.643 -1.230 -1.310 - 1.180 - 1.230 -0.996 -0.470