What is the pH of a .025 M HCl solution?

We have to calculate the pH of a 0.025 M HCl solution. The **pH of a solution** is calculating using this formula:

$\overline{){\mathrm{pH}}{}{=}{}{-}{\mathrm{log}}\left[{\mathrm{H}}_{3}{\mathrm{O}}^{+}\right]}$

pH and pOH