Why is phosphoric acid a strong acid?

Answer 1

phosphoric acid is a weak tribasic acid because it ionizes to smaller extents.it reacts with NaOH to give three series of salts.. h3po4+naoh---->H2o+NaH2PO4

NaH2Po4+NaOH------>H2O+Na2HPO4

Na2HPO4+NaOH-------->H2O+Na3PO4 . . . .thats it..

Answer 2

Phosphorous acid has the formula of H3PO3. From looking at it, one would say it is TRIprotic, not DIprotic. But, it is considered a diprotic acid because only the 1st two hydrogens readily dissociate leading to H+ + H2PO3^- and the H+ + HPO3^2-. This last H in HPO3^2- does not dissociate.

Answer 3

Because phosphoric acid has a high dissociation constant, meaning that most of it is converted to hydronium ions and phosphate anions.

Answer 4

It can donate 3 times one proton, becoming weaker and weaker acid:

H3PO4 --> H+ + H2PO4-

H2PO4- --> H+ + HPO42-

HPO42- --> H+ + PO43-

Answer 5

It is because it dissolves in water and produce H positive ions.

Answer 6

Because it is an oxide of non-metal