Answer
This is a basic solution.
Work Step by Step
1. Calculate the hydroxide ion concentration:
$[H_3O^+] * [OH^-] = Kw = 10^{-14}$
$1.4 \times 10^{-9} * [OH^-] = 10^{-14}$
$[OH^-] = \frac{10^{-14}}{1.4 \times 10^{-9}}$
$[OH^-] = 7.1 \times 10^{-6}M$
2. Identify which one is greater: $[H_3O^+]$ or $[OH^-]$
- Since $7.1 \times 10^{-6} \gt 1.4 \times 10^{-9}$, the hydroxide ion concentration is greater. Which means that this is a basic solution.
$[H_3O^+] \lt [OH^-]:$ Basic solution.
