• # question_answer What is the $O{{H}^{-}}$ concentration of an aqueous solution of a substance whose $pH=3.2$:- A)  ${{10}^{-3.8}}$               B)  ${{10}^{-3.2}}$C)  ${{10}^{-10.8}}$              D)  ${{10}^{-10.2}}$

$pH=3.2\Rightarrow pOH=14-3.2=10.8$ $\Rightarrow$ $-\log \,[O{{H}^{-}}]=10.8$ $\Rightarrow$ $\,[O{{H}^{-}}]={{10}^{-10.8}}$