Three reactions involving H2PO–4 are given below(i) H3PO4 + H2O → H3O+ + H2PO–4(ii) H2PO–4 + H2O → HPO2–4 + H3O+(iii) H2PO–4 + OH– → H3PO4 + O2–In which of the above does H2PO

For Competitive Exams

Three reactions involving H₂PO–
4 are given below

(i) H₃PO₄ + H₂O → H₃O⁺ + H₂PO–
4

(ii) H₂PO–
4 + H₂O → HPO2–
4 + H₃O⁺

(iii) H₂PO–
4 + OH^– → H₃PO₄ + O^2–

In which of the above does H₂PO–
4 act as an acid?

(i) only

(ii) only

(iii) only

(i) and (ii)

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