Question

What is the pH value of a solution whose hydroxyl ion concentration is $1\times {10}^{-2}M$?

Answer 1

$\left[{OH}^{-}\right]=1\times {10}^{-2}M$
$p\left[{OH}^{-}\right]=-\log \left[{OH}^{-}\right]$
$p\left[{OH}^{-}\right]=2$
$p\left[H^{+}\right]+p\left[{OH}^{-}\right]=14$
$p\left[H^{+}\right]+2=14$
$p\left[H^{+}\right]=12$