What sort of acid is phosphoric acid in aqueous solution?

1 Answer
May 13, 2017

Answer:

Because the parent acid is potentially triprotic.............and phosphate salts, i.e. salts of #PO_4^(3-)# are possible.

Explanation:

I write #"potentially"# because in aqueous solution, phosphoric acid is to all intents and purposes, a diacid:

#H_3PO_4(aq) + 2KOH(aq) rarr K_2HPO_4(aq) + 2H_2O(l)#,

i.e. the salt is potassium biphosphate, #K_2^(+)[HPO_4]^(2-)#