Question

The $p^H$ of a solution is $3.602$. Its $H^{+}$ ion concentration is:

• A. $4\times {10}^{-14}$
• B. $2.5\times {10}^{-11}$
• C. $2.5\times {10}^{-4}$
• D. $5.0\times {10}^{-4}$

Answer 1

The correct option is B $2.5\times {10}^{-11}$

The formula relating to the concentration of hydrogen ion is

$P^H=-log\left[H^{+}\right]$

Rearranging the equation,

$\Rightarrow \left[H^{+}\right]={10}^{-P^H}$

$\Rightarrow \left[H^{+}\right]={10}^{-3.602}$

$\Rightarrow \left[H^{+}\right]=2.500\times {10}^{-4}$