Why is H3PO4 an acid?

Answer 1

H3PO4 or Phosphoric Acid is acidic because it increases the concentration of hydronium ions (H3O+) in solution.

Answer 2

H3PO4 is an acid because it can donate a hydrogen ion (proton) when dissolved in water, resulting in the formation of hydronium ions. This gives the solution acidic properties, as it increases the concentration of H+ ions. Additionally, phosphoric acid (H3PO4) has a dissociation constant (Ka) which indicates its ability to donate hydrogen ions in solution.