# What is the pH of a .013 M HCl solution?

Jul 3, 2016

The pH of this solution is 1.89.

#### Explanation:

Since HCl is a strong acid, it completely dissociates into its respective ions when placed in water. In this case HCl ionizes to produce ${H}^{+} \left(a q\right)$ and $C {l}^{-} \left(a q\right)$.

As soon as we know that we're dealing with a strong acid, the pH can be obtained directly from the concentration of ${H}^{+}$ using the following formula:

pH = -log[H^(+]

All we have to do is take the -log of the given concentration like so:

$p H = - \log \left[0.013\right]$

$p H = 1.89$