試題詳解

11. The pH of a 0.05 M solution of trichloroacetic acid (CCl₃CO₂H), a corrosive acid used to precipitate proteins, has the same pH as a 0.04 M HClO₄ solution. The Ka for trichloroacetic acid is thus .
(A)4.0 × 10^-8
(B)1.6 × 10^-5
(C)0.16
(D) 1.4 × 10^-14
(E)0.001