KNO3 doesn't hydrolyze.
HPO42- + H2O ==> H3O+ + PO43-
Which gave away the H+? That is HPO43-.So that is the conjugate base and HPO41- is the acid. H2O accepted the H+ so it is the base and H3O+ is the conjugate acid.
We could write it another way.
HPO42- + HOH ==> H2PO4- + OH-
So the HPO42- is the base and HOH is the acid.
Which way does it actually go? You look up the K2 and K3.
The first reaction, which is an ionization equation, is k3 for H3PO4.
The second one, which is an hydrolysis, is K = Kw/k2
MH4+ + HOH ==> NH3 + H3O^+
How can you write a net ion equation and identify the conjugate acid/base pairs for these followings?
KNO3
Na2HPO4
NH4Br
1 answer