Phosphoric acid H3PO4aq is a triprotic acid meaning that one

Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.400 M phosphoric acid solution.

[H3PO4]=

[H2PO4]=

[HPO4]=

[PO4]=

[H]=

[OH]=

pH=

Solution

h3po4 -4