(a) ethylamine, C2H5NH2(aq); Kb = 5.6 10-4 (b) aniline, C6H5NH2(aq); Kb = 3.8 10-10 (c) pyridine, C5H5N(aq); Kb = 1.7 10-9 and Calculate the pH of a 0.38 M CH3COONa solution. and What is the pH of 270.0 mL of an aqueous solution containing 0.525 g of the strong acid trifluoromethane sulfonic acid (CF3SO3H)?