Aqueous Solutions of Phosphoric Acid and Sodium Nitrite Are Combined

Aqueous solutions of phosphoric acid and sodium nitrite are combined, and the following equilibrium is established. The equilibrium constant K_c 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.

Correct Answer:

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