Question

$20$ mL of $0.1NHCl$ is mixed with $20$ mL of $0.1NKOH$. The pH of the solution would be:

• A. $0$
• B. $7$
• C. $2$
• D. $9$

Answer 1

The correct option is B $7$

As we know, $pH=-log\left[H^{+}\right]$

For neutral solution, $pH=7$

For acidic solution, $pH<7$

For basic solution, $pH>7$

Here, $\left[H^{+}\right]=20\times 0.1=\left[O{H}^{-}\right]$

So, it will be a neutral solution with $pH=7$.