Question
Basicity of orthophosphoric acid is
A.
2
B.
3
C.
4
D.
5
Answer :
3
Solution :
Orthophosphoric acid $$\left( {{H_3}P{O_4}} \right)$$ have the following structure
It is clear from the structure that it contains three replaceable hydrogen atoms, so it gives three $${H^ + }$$ $$ions$$ on dissolution in water. So, the basicity of $${{H_3}P{O_4}}$$ is three.
$${H_3}P{O_4} \to 3{H^ + } + PO_4^{3 - }$$
Orthophosphoric acid $$\left( {{H_3}P{O_4}} \right)$$ have the following structure
It is clear from the structure that it contains three replaceable hydrogen atoms, so it gives three $${H^ + }$$ $$ions$$ on dissolution in water. So, the basicity of $${{H_3}P{O_4}}$$ is three.
$${H_3}P{O_4} \to 3{H^ + } + PO_4^{3 - }$$