# Identify the Bronsted-Lowry acid and base in the reaction "NH"_4^(+)(aq) + "H"_2"O"(l) -> "NH"_3(aq) + "H"_3"O"^(+)(aq)? What is the conjugate base?

Aug 14, 2017

Well, for...

${\text{NH"_4^(+)(aq) + "H"_2"O"(l) -> "NH"_3(aq) + "H"_3"O}}^{+} \left(a q\right)$,

the conjugate base has one less ${\text{H}}^{+}$. What has one less ${\text{H}}^{+}$ than ${\text{H"_3"O}}^{+}$?

$\text{H"_3"O"^(+) - "H"^(+) = "H"_2"O}$

And in fact, water is amphoteric. What is the conjugate base of $\text{H"_2"O}$ in...

${\text{H"_2"O"(l) + "CH"_3"COO"^(-)(aq) -> "CH"_3"COOH"(aq) + "OH}}^{-} \left(a q\right)$?

Given that acetate, ${\text{CH"_3"COO}}^{-}$, is a weak base, will acetic acid be a weak or strong acid?