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 Kc 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 wesker base than the dihydrogen phosphate anion.
e. Phosphoric acid is a stronger acid than nitrous acid.