Question
Question: Three reactions involving H2PO4– are given below : (i) H3PO4 + H2O ®H3O+ + H2PO4– (ii) H2PO4– + H2...
Three reactions involving H2PO4– are given below :
(i) H3PO4 + H2O ®H3O+ + H2PO4–
(ii) H2PO4– + H2O ® HPO42– + H3O+
(iii) H2PO4– + OH–® H3PO4+ O2–
In which of the above does H2PO4– act as an acid ?
A
(ii) only
B
(i) and (ii)
C
(iii) only
D
(i) only
Answer
(ii) only
Explanation
Solution
In IInd equation H2PO4– give H+ ion to the H2O therefore in the IInd equation it act as an acid.