44. Solving a chemistry problem

243. According to the experimental data on the adsorption of phenol on the ion exchanger at 423 K, graphically determine:
a) constants of the Freundlich and Langmuir equations;
b) write down the Freundlich and Langmuir equations, taking into account the obtained constants;
c) using the constants of the Langmuir equation, construct the Langmuir adsorption isotherm:
С 102, mol/l 1.5 4.5 7.5 9.0
A 103 kg/kg 0.40 1.05 1.18 1.20