Question

The basicity of $H_{3}P{O}_4$ and $H_{3}B{O}_3$ are

• A. 3 and 3 respectively
• B. 2 and 3 respectively
• C. 2 and 2 respectively
• D. 3 and 1 respectively

Answer 1

The correct option is D 3 and 1 respectively

$H_{3}P{O}_4$ has three replacable protons and hence the basicity of $H_{3}P{O}_4$ is 3.

$H_{3}B{O}_3$, on the other hand, releases one proton by this reaction

One mole of $H_{3}B{O}_3$ gives only one proton, therefore the basiscity of $H_{3}B{O}_3$ is 1.