A researcher is studying the effect of a drug on the pH of stomach acid, which has a pKa of 1.5. If the pH of the stomach acid is adjusted to 3.0, what is the ratio of the drug's conjugate base to conjugate acid?

• A. Ratio = 10^(3.0 - 1.5) = 31.62
• B. Ratio = 10^(3.0 - 1.5) = 3.16
• C. Ratio = 10^(3.0 - 1.5) = 0.32
• D. Ratio = 10^(3.0 - 1.5) = 1.78

Answer: (A)