Question

A solution contains 10 mL of 0.1 N NaOH and 10 mL of 0.05 $N{a}_{2}S{O}_4$. pH of this solution is

• A. equal to 7
• B. less than 7
• C. greater than 7
• D. zero

Answer 1

The correct option is C greater than 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 due to strong base and neutral salt, it's a basic solution. So its $pH$ will be greater than $7$.