Phosphoric acid is a polyprotic acid. Write balanced chemical equations for the sequence of reactions that phosphoric acid can undergo when it's dissolved in water. True or false?

True. It is a polyprotic acid because it can release more than one proton. In this case this weak acid releases 3 protons, donated to water to increase the hydronium concentration. There are 3 equilibriums.

Explanation:

H₃PO₄  +  H₂O  ⇄  H₃O⁺  +   H₂PO₄⁻                 Ka₁

H₂PO₄⁻   +  H₂O  ⇄  H₃O⁺  +   HPO₄⁻²               Ka₂

HPO₄⁻²   +  H₂O  ⇄  H₃O⁺   +   PO₄⁻³                 Ka₃

Diprotic acids → They release 2 H⁺

Carbonic acid

Monoprotic acids →  They release 1 H⁺

Acetic acid

explanation:

crosscutting concepts have application across all domains of science. as such, they are a way of linking the different domains of science. they include patterns; cause and effect; scale, proportion, and quantity; systems and system models; energy and matter; structure and function; and stability and change.