Answer
The pH of blood is equal to 7.4;
Work Step by Step
1. Using the Henderson–Hasselbalch equation:
$pH = pKa + log(\frac{[Base]}{[Acid]})$
$pH = 6.1 + log(\frac{0.024}{1.2 \times 10^{-3}})$
$pH = 6.1 + log(20)$
$pH = 6.1 + 1.30$
$pH = 7.4$
