# A. Give the conjugate base of NH4+ ? B. Give the conjugate acid of 2 HPO4− ?

## A. Give the conjugate base of NH4+ ? B. Give the conjugate acid of 2 HPO4− ?

The conjugate base of ammonium ion, $N {H}_{4}^{+}$, is ammonia, $N {H}_{3}$.............
.........And the conjugate acid of bisphosphate ion, $H P {O}_{4}^{2 -}$, is ${H}_{2} P {O}_{4}^{-}$.
As with all of these conjugate acid/conjugate base problems, I am simply simply exchanging a proton, ${H}^{+}$, and conserving mass AND charge. If mass and charge were not conserved, it would not be a realistic exercise.
What are the conjugate bases of ${H}_{2} S {O}_{4}$, $H S {O}_{4}^{-}$, $N {H}_{3}$, $H {O}^{-}$, and $N {H}_{2}^{-}$? What are their conjugate acids?