If a Buffer Is Made Up Using 1

Multiple Choice

If a buffer is made up using 1.00 mole of a weak acid (pK_a = 5.00) and 0.90 mole of its conjugate base, which of the following must be true?

A) pH < 5.00
B) pH = 5.00
C) pH > 5.00
D) pH = 7.00
E) pH > 7.00