076. Solving a chemistry problem

14. The molar absorption coefficients of the acidic (HA) and basic (A-) forms of benzoic acid at λ=286 nm are equal: εHa=450, εA=50. The dissociation constant of benzoic acid is Ka0=630*10-5. Calculate for λ=286 nm: a) optical density of 2.00*10-2 M benzoic acid solution in a cuvette with l=1.00 mm; b) the optical density of the solution obtained by diluting the previous one 100 times and placed in a cuvette with l = 10.00 cm. What is the relative deviation from the basic law of light absorption when the solution is diluted 100 times?