Which of the following is true regarding a phosphoric acid solution?
A) H3PO4 completely ionizes to form H2PO4- and H3O+.
B) At equilibrium,the major species present are H2O,H3O+ and PO43-.
C) There are no HPO42- or PO43- ions present at equilibrium.
D) At equilibrium,H3PO4 is present at the highest concentration,followed by H2PO4-,HPO42-,and PO43-.
E) H3PO4,H2PO4-,HPO42-,and PO43- generate hydronium ions in the solution.
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