Question

The pOH value of a solution whose hydroxide ion concentration is $6.2\times 10^{-9}$ mol/litre is

• A. 8.21
• B. 6.21
• C. 7.75
• D. 7.21

Answer 1

Answer: (A)

$-\log (OH)=pOH;-\log 6.2\times 10^{-9}=pOH;$
$\therefore pOH=8.21$