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When Phosphoric Acid (H3PO4)dissolves in Water, the Equilibrium Shown Below

question 69

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When phosphoric acid (H3PO4) dissolves in water, the equilibrium shown below is established. If Ka = 7.5 × 10-3 for H3PO4, which statement concerning an aqueous solution of phosphoric acid is correct?
H3PO4 + H2O When phosphoric acid (H<sub>3</sub>PO<sub>4</sub>) dissolves in water, the equilibrium shown below is established. If K<sub>a </sub>= 7.5 × 10<sup>-3</sup> for H<sub>3</sub>PO<sub>4</sub>, which statement concerning an aqueous solution of phosphoric acid is correct? H<sub>3</sub>PO<sub>4</sub> + H<sub>2</sub>O   H<sub>3</sub>O<sup>+</sup> + H<sub>2</sub>PO<sub>4</sub><sup>-</sup> A) An aqueous solution of phosphoric acid contains mainly H<sub>3</sub>PO<sub>4</sub> molecules. B) An aqueous solution of phosphoric acid contains predominantly H<sub>3</sub>O<sup>+</sup> and H<sub>2</sub>PO<sub>4</sub><sup>- </sup>ions. C) An aqueous solution of phosphoric acid contains equal amounts of H<sub>3</sub>O<sup>+</sup> and H<sub>3</sub>PO<sub>4</sub>. D) An aqueous solution of phosphoric acid contains a greater concentration of dissolved ions than it does neutral phosphoric acid molecules. H3O+ + H2PO4-


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