Question

What is pOH of an aqueous solution with hydrogen ion concentration equal to $3\times {10}^{-5}mol{L}^{-1}$?

• A. $9.47$
• B. $4.52$
• C. $12.69$
• D. $11.69$

Answer 1

The correct option is A $9.47$

$\left[H^{+}\right]=3\ast {10}^{-5}mol/L$

$pOH=14-pH$

$pH=-log\left[H^{+}\right]=-log(3\ast {10}^{-5})=4.5229$

$pOH=14-4.5229$

$\therefore pOH=9.47$