Question

What is the pOH of a solution with $\left[H^{+}\right]$ = $0.001M$?

• A. $-3$
• B. $1$
• C. $3$
• D. $11$
• E. $14$

Answer 1

Answer: (D)

$11$

Given $H^{+}={10}^{-3}M$

$\therefore pH=-{log}_{10}\left(H^{+}\right)=3$

Now, $pH+pOH=14$

$\therefore 3+pOH=14$

$\therefore pOH=11$