# What is the H^+ concentration for an aqueous solution with pOH = 3.05 at 25°C?

Apr 25, 2017

If pOH is 3.05, pH is 10.95 or $\left[{H}^{+}\right] = 1.122 \cdot {10}^{-} 11$ mol/L

#### Explanation:

$p H = - \log \left({H}^{+}\right)$

Now, what is ${H}^{+}$ if your pH is 10.95 (since pH+pOH=14, your pH=10.95).

$\left({H}^{+}\right) = {10}^{- 10.95}$

$\left({H}^{+}\right) = 1.122 \cdot {10}^{-} 11$

This is your hydrogen ion concentration: $\left[{H}^{+}\right] = 0.00000000001122$ mol/L