Question

What is the pH if $\left[H_3{O}^{+}\right]=3.5\times {10}^{-4}$ M?

• A. 3.5
• B. 12
• C. 0.35
• D. $1\times {10}^{-14}$
• E. 4

Answer 1

Answer: (A)

3.5

$\left[H_3{O}^{+}\right]=3.5\times {10}^{-4}M$
$pH=-log\left[H_3{O}^{+}\right]=-log3.5\times {10}^{-4}=3.5$