試題詳解

43. Consider a buffered solution containing CH₃NH:Cl and CH₃NH₂. Which of the following
statements concerning this solution are TRUE?
(A) A solution consisting of 0.10 M CH₃NH₃CI and 0.10 M CH₃NH₂ would have a higher
buffering capacity than one containing 1.0 M CH3NH3CI and 1.0 M CH₃NH₂.
(B) If [CH₃NH₂] ＞ [CH₃NH₃⁺], then the pH is larger than the pKa value of CH₃NH₃⁺ .
(C) Adding more [CH₃NH₃Cl] to the initial buffer solution will increase the pH.
(D) If [CH₃NH₂] ＞ [CH₃NH₃⁺], then pH ＞ 10.50.

(E) IF [CH₃NH₂] = [CH₃NH₃⁺], then pH = 3.30.