Question

Hydroxyl ion concentration of $10^{-2}MHCl$ is

• A. $1\times 10^{1}mold{m}^{-3}$
• B. $1\times 10^{-12}mold{m}^{-3}$
• C. $1\times 10^{-1}mold{m}^{-3}$
• D. $1\times 10^{-14}mold{m}^{-3}$

Answer 1

Answer: (B)

$\left[H^{+}\right]\left[O{H}^{-}\right]=10^{-14}\left[10^{-2}\right]\left[O{H}^{-}\right]$
$=10^{-14}\left[O{H}^{-}\right]=\frac{10^{-14}}{10^{-2}}$
$=10^{-12}mold{m}^{-3}$