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Three reactions involving H(2)PO(4)^(-) ...

Three reactions involving `H_(2)PO_(4)^(-)` are given below
`I. H_(3)PO_(4)+H_(2)OrarrH_(3)O^(+)+H_(2)PO_(4)^(-)`
`II. H_(2)PO_(4)^(-)+H_(2)OrarrHPO_(4)^(2-)+H_(3)O^(+)`
`III. H_(2)PO_(4)^(-)+OH^(-)rarrH_(3)PO_(4)+O^(2+)`
In which of the above does `H_(2)PO_(4)^(-)` act as an acid?

A

ii only

B

I and ii

C

iii only

D

I only

Text Solution

Verified by Experts

In `II^(nd)` equation `H_(2)PO_(4-)` gives one `H^(+)` ion to `H_(2)O` therefore in the `II^(nd)` equation it act as an acid .
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