Question

Total numbers of buffers can be made by reaction of $H_{3}P{O}_4$ and $NaOH$ is

• A. 3
• B. 1
• C. 4
• D. 2

Answer 1

The correct option is A 3

$H_{3}P{O}_4$ has 3 replacable or acidic protons.
$H_{2}P{O}_4^{-}$ and $HP{O}_4^{2-}$and $P{O}_4^{3-}$ all these three ions can react differently with $NaOH$ molecule to form three different solutions that can act as buffer solution.
hence, total number of buffer can be made is equal to three.