Answer
$[H_3O^+] = 4.464 \times 10^{- 8}$
- The human blood is a basic solution.
Work Step by Step
$[OH^-] * [H_3O^+] = Kw = 10^{-14}$
$ 2.24 \times 10^{- 7} * [H_3O^+] = 10^{-14}$
$[H_3O^+] = \frac{10^{-14}}{ 2.24 \times 10^{- 7}}$
$[H_3O^+] = 4.464 \times 10^{- 8}$
Since $[OH^-] > [H_3O^+]$, the solution is basic.