Question

Which of the following solutions has $pH$ exactly equal to $8$?

• A. ${10}^{-8}M$ $HCl$ solution
• B. Solution containing ${10}^{-8}M$ $H^{+}$
• C. $2\times {10}^{-6}M$ $Ba{\left(OH\right)}_2$ solution
• D. ${10}^{-8}M$ $NaOH$

Answer 1

The correct option is B Solution containing ${10}^{-8}M$ $H^{+}$

Solution containing ${10}^{-8}M{H}^{+}$

The $pH$ can be obtained directly from the concentration using the formula

$pH=-{log[H}^{+}]$

$pH=-log[1\times {10}^{-8}M]=8$

Therefore, the $pH$ of the solution is 8.