Question

Question #627f1

Answer 1

a) conjugate base: `NH_3`
b) conjugate acid: `H_2PO_4^(-)`

Explanation:

I think in your question you meant to ask for the conjugate base of `NH_4^+` and the conjugate acid of `HPO_4^(2-)`

`HPO_4^(2-)` has the ability of being both an acid and a base. If it's considered an acid, the conjugate base would be `PO_4^(3-)`. If it's considered the base, the conjugate acid would be `H_2PO_4^(-)`.

Conjugate bases result once an acid donates its hydrogen ion.

Conjugate acids result once a base donates its hydrogen ion.

Hope this helps.