# Question #07d32

${\text{HNO}}_{3}$ or nitric acid, is a very strong acid. Since a strong acid dissociates completely and nitric acid offers one proton per molecule, you take the molar concentration of the acid and use that as the Hydrogen ion concentration.
$p H = - \log \left(2 \times {10}^{-} 4 M\right)$
$p H = 3.7$