Question

If the $pH$ of $HCl$ solution is $2$ then the molar concentration of this will be:

• A. 0.01 M
• B. 2 M
• C. 0.4 M
• D. 0.02 M

Answer 1

Answer: (A)

$pH=-\log \left[H^{+}\right]$
$2=-\log \left[H^{+}\right]$
$\left[H^{+}\right]=10^{-2}$
$=0.01M$