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><sup>-</sup>(aq) H<sub>2</sub>PO<sub>4</sub><sup>-</sup>(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 fact that the equilibrium constant for the reaction is greater than 1 indicates that the products are favored in the equilibrium. This means that the reaction proceeds towards the right-hand side of the equation, which means that the acid on the left-hand side must be stronger than the acid on the right-hand side. Therefore, phosphoric acid (H₃PO₄) is a stronger acid than nitrous acid (HNO₂), and choice E is correct. Choices A, B, C, and D are incorrect based on this reasoning.

Aqueous Solutions of Phosphoric Acid and Sodium Nitrite Are Combined,and