試題詳解

10. You are given a solution of the weak base Novocain, Nvc. Its pH is 11.00. You add to the solution a small amount of a salt containing the conjugate acid of Novocain, NvcH+. Which statement is true?
(A) The pH and the pOH remain unchanged.
(B) The pH and the pOH both decrease.
(C) The pH and the pOH both increase.
(D) The pH increases and pOH decreases.
(E) The pH decreases and the pOH increases.