Comment on the relative acidities of h3po4 and the h2po4 ion?
I don't understand what this question is asking? Would H3PO4 is a strong acid and will completely dissociate into ions in aqueous solution suffice?
2 answers
H3PO4 would readily donate a proton in solution compared to H2PO4. I think that would suffice.
Note that H3PO4 is NOT a strong acid and does NOT ionize completely in solution.