Question

A weak monobasic acid is half neutralized by a strong base. If the pH of the solution is 5.4 its $p{K}_a$ is

• A. 6.8
• B. 2.7
• C. 5.4
• D. 10.8

Answer 1

Answer: (C)

At the half neutralisation point
$pH=p{K}_a=5.4$