Aqueous solutions of phosphoric acid and sodium nitrite are combined, and the following equilibrium is established. H₃PO₄(aq) + NO₂(aq) H₂PO₄(aq) + HNO₂(aq)
The equilibrium constant K_c for this reaction is greater than one. Based on this information, which of the following statements is correct?

Question

Aqueous solutions of phosphoric acid and sodium nitrite are combined, and the following equilibrium is established. H₃PO₄(aq) + NO₂(aq)

Aqueous solutions of phosphoric acid and sodium nitrite are combined, and the following equilibrium is established. H<sub>3</sub>PO<sub>4</sub>(aq) + NO<sub>2</sub>(aq) H<sub>2</sub>PO<sub>4</sub>(aq) + HNO<sub>2</sub>(aq) The equilibrium constant K<sub>c</sub> for this reaction is greater than one. Based on this information, which of the following statements is correct? A) Phosphoric acid is a weaker acid than nitrous acid. B) Nitrous acid is a weaker acid than water. C) The nitrite anion is a weaker base than the dihydrogen phosphate anion. D) The dihydrogen phosphate anion is a stronger acid than nitrous acid. E) Phosphoric acid is a stronger acid than nitrous acid.

H₂PO₄(aq) + HNO₂(aq)
The equilibrium constant K_c for this reaction is greater than one. Based on this information, which of the following statements is correct?

Quizplus · Accepted Answer

The equilibrium constant being greater than one indicates that the forward reaction is favored, which means that the product side is more stable than the reactant side. Since the product side has H3PO4, which is an acid that can donate three protons, it must be a stronger acid than HNO2, which can only donate one proton. Therefore, choice E is the correct answer.

Aqueous Solutions of Phosphoric Acid and Sodium Nitrite Are Combined