1.

Identify the species that can give both conjugate acid and conjugate base

Answer»

`NH_(4)^(+)`
`H_(2)PO_(4)^(-)`
`PO_(4)^(-3)`
`H_(3)O^(+)`

Solution :`H_(2)PO_(4)^(-)` can form CONJUGATE BASE `HPO4_(2)^(-)` and conjugate acid `H_(3)PO_(4)`


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