Three reactions involving $H_2PO_4^−$ are given below : (i) H3PO4 + H2O $\to$ H3O+ + $H_2PO_4^−$ (ii) $H_2PO_4^−$ + H2O $\to$ $HPO_4^{2−}$ + H3O+ (iii) $H_2PO_4^−$ + OH- $\to$H3PO4 + O2- In which of the above does $H_2PO_4^−$ act as an acid?

Question

Three reactions involving $H_2PO_4^−$ are given below :

(i) H₃PO₄ + H₂O $\to$ H₃O⁺ + $H_2PO_4^−$

(ii) $H_2PO_4^−$ + H₂O $\to$ $HPO_4^{2−}$ + H₃O⁺

(iii) $H_2PO_4^−$ + OH^- $\to$H₃PO₄ + O^2-

In which of the above does $H_2PO_4^−$ act as an acid?

(ii) only

(i) and (ii)

(iii) only

(i) only

Solution

Please login to view the detailed solution steps...

Go to DASH