Brønsted Acid-Base Equilibria

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 pKa values is provided at the bottom of the page.
For each equilibrium, three questions are posed:

Reactant A + Reactant BReactant C + Reactant DWhich act
as acids?
Which is the
stronger base?
Which side
is favored?
(CH3)3COH   +   Na(+) OH(–)(CH3)3CO(–) Na(+)   +   H2OEnter two letters
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HF     +     CH3CO2NaNaF     +     CH3CO2HEnter two letters
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NaSH     +     C6H5OHH2S     +     C6H5ONaEnter two letters
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NaCN     +     Na2HPO4Na3PO4     +     HCNEnter two letters
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NaHCO3     +     NH4ClH2CO3   +   NH3   +   NaClEnter two letters
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AcidHClH3O(+)H3PO4HFCH3CO2H H2CO3H2SNH4(+)HCNC6H5OHH2O(CH3)3COHNH3
pKa-7-1.72.2
7.2
12.3
3.24.76.4
10.3
7.09.29.310.015.71934