Ratio of Base to Acid?

Question

Novocaine, used as a local anesthetic by dentists, is a weak base (pKa = 8.95).

What is the ratio of the concentration of the base to that of its acid in the blood plasma (pH = 7.40) of a patient.

Answer 1

pOH = 14 - pH = 6.6

6.6 = 8.95 + log [BH+] / [B]

10^-2.35 =0.00447 = [BH+] / [B]

[B] / [BH+] = 223.8

Answer 2

1:1