Calculate the pH of a buffer system containing 1.5 M NH, and 0.5 M NH CI. (K, of NH4+, the acid in this system, is 5.6 x 10-10.) Enter your answer in the provided box. pH Enter your answer in the provided box. Calculate the pH of a buffer solution in which the acetic acid concentration is 2.0 x 10-4 M and the sodium acetate concentration is 8.2 x 10-4 M. The equilibrium constant, Kg, for acetic acid is 1.8 * 10-5. pH =