posted by bob .
Which of the following is not amphiprotic?
e)all choices are amphiprotic
Do you know what amphiprotic means? It means the material can act both as an acid and a base. H2O can do that.
H^+ + H2O ==> H2O^+
H2O + H2O ==> H2O^+ + OH^-
What about HSO4^-? it can donate a proton as in the first equation below; it can accept a proton as in the second equation.
I can get HSO4^- ==> H^+ + SO4^- or
HSO4^- + H^+ ==> H2SO4