Five acid-base equilibria are shown below. In each equation the two reactants on the left side of the equilibrium are designated A & B; the two reactants on the right are designated C & D. In the first equation, the charges of ionic reactants are shown; for the other four reactions these charges are omitted. In the fifth equation, H₂CO₃ is reactant C and NH₃ is D. NaCl is an inert product. A table of pK_a values is provided at the bottom of the page.
For each equilibrium, three questions are posed:

• Which reactants function as Brønsted acids? [Two letters (A through D) should be entered in the answer box.]
• Which reactant is the stronger base? [One letter (A through D) should be entered in the answer box.]
• Which side of the equilibrium is favored? [Two letters (AB or CD) should be entered in the answer box.]

Reactant A + Reactant B		Reactant C + Reactant D	Which act as acids?	Which is the stronger base?	Which side is favored?
(CH3)3COH + Na(+) OH(–)		(CH3)3CO(–) Na(+) + H2O	Enter two letters	Enter one letter	Enter two letters
HF + CH3CO2Na		NaF + CH3CO2H	Enter two letters	Enter one letter	Enter two letters
NaSH + C6H5OH		H2S + C6H5ONa	Enter two letters	Enter one letter	Enter two letters
NaCN + Na2HPO4		Na3PO4 + HCN	Enter two letters	Enter one letter	Enter two letters
NaHCO3 + NH4Cl		H2CO3 + NH3 + NaCl	Enter two letters	Enter one letter	Enter two letters