Two 0.100 L buffer solutions are prepared. Buffer A contains 0.20 M NH3 and 0.20 M NH4Cl (pKa = 9.25). Buffer B contains 0.20 M CH3COOH and 0.20 M CH3COONa (pKa = 4.76). To each buffer, 0.0050 mol of HCl is added; the volume change is negligible. Which statement is most accurate regarding the magnitude of the pH decrease in the two buffers?
(a) Buffer A experiences a smaller pH decrease than Buffer B.
(b) Neither buffer effectively resists the pH change because the acid is strong.
(c) Both buffers experience approximately the same pH decrease.
(d) Buffer B experiences a smaller pH decrease than Buffer A.