Question

The $pH$ of a solution is $5.0$. If $H^{+}$ion concentration is decreased $100$ times. Then the solution will be :

• A. neutral
• B. more acidic
• C. basic
• D. of the same acidity

Answer 1

Answer: (A)

$pH$ of the solution $=5$
$\left[H^{+}\right]=10^{-5}M$
On decreasing the $H^{+}$ion concentration $100$ times the $\left[H^{+}\right]$becomes
$=\frac{10^{-5}}{100}=10^{-7}M$
Now $pH=7$, which signifies a neutral solution.